Make Ahead Veggie Breakfast Casserole Recipe | Little Spice Jar (2024)

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A super simple veggie loaded breakfast casserole that’s easily customizable! I loaded mine with shredded potatohash browns, tons of fresh veggies, and a big dash of hot sauce! You can add crumbled sausage, shredded chicken, or anything else you please!

Make Ahead Veggie Breakfast Casserole Recipe | Little Spice Jar (1)

FRI-YAY!

I am so excited to be bringing you one of my all-time favorite breakfast casseroles. It’s loaded with shredded potato hash browns and tons ofsauteéd spinach, bell peppers, and mushrooms. Not only is it a cinch to whip up, but it’s also totally customizable! Be it sausage, ground chicken/turkey, shredded rotisserie chicken, or meatless – with tons of veggies like I made it. The options are endless.

Once you’ve got your protein picked out, grab your favorite cheese and start shredding.Mozzarella, swiss, and sharp cheddar are just some of the cheeses that will pair well with this casserole.

BUT BUT BUT! More reasons to make it –> you can MAKE IT AHEADand just bake it off in the morning. How good would this be for Halloween, Thanksgiving, or Christmas breakfast? A nice hearty and veggie loaded casserole that’ll keep you and the little ones going all day long.

How to make a veggie breakfast casserole:

Make Ahead Veggie Breakfast Casserole Recipe | Little Spice Jar (2)

I kind of debated whether I should actually call this a ‘breakfast casserole recipe’ as it’s more of a guideline that can easily be adapted to yourfamily’s breakfast casserole needs.

Did I mention it makes a ton? Like 10-12 servings! The hubby and I enjoyed this casserole for a couple of days but it’s one of those that actually tastes better with time. And yeah, you bet it was dinner the next day. But loaded with veggies and eggs, it’s hearty and keeps you full for hours afterward.

I spiced mine up with a whole ¼ cup of Franks hot sauce. And it gave the casserole so much flavor. If you’ve got little ones, you can cut the hot sauce back to a couple oftablespoons or leave it out altogether. But even with the ¼ cup added into the breakfast casserole, I still splashed on a little more before gobbling it down!

Make Ahead Veggie Breakfast Casserole Recipe | Little Spice Jar (3)

Let’s talk about the breakfast casserole recipe.

It’s super simple, I promise.

I sautéed the veggies separately in a skillet before layering them in. If you decide to use any kind of protein, just sauté it before adding it into the casserole.

So it starts like this – just spray a 9×13 casserole dish down with a good coating of cooking spray. We want the hash browns on the bottom to get nice and colored. Then add in the hash brown, pack them in firmly. Next, whisk the eggs, salt and pepper, milk, and if you’re using it, hot sauce, in a bowl and set it aside. Saute and add your protein +veggies on top of the potatoes and drizzle on your egg mixture. Top it with your favorite cheese and that’s it! Let it all bake up for 45 minutes and you’ve got a perfect breakfast casserole that’s great for brunch or lazy Saturday mornings.

Sometimes I like to assemble the casserole from the night before and let it come to room temperature for about 20 minutes while I enjoy a cup of coffee and bake it off in the morning.

Lazy Saturday morning breakfasts are my favorite part of the whole week.

Make Ahead Veggie Breakfast Casserole Recipe | Little Spice Jar (4)

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Yield: serves 10-12

Veggie-Loaded Breakfast Casserole

Prep Time20 minutes

Cook Time45 minutes

Total Time1 hour 5 minutes

A super simple veggie loaded breakfast casserole that's easily customizable! I loaded mine with shredded potato hash browns, tons of fresh veggies, and a big dash of hot sauce! You can add crumbled sausage, shredded chicken, or anything else you please!

Make Ahead Veggie Breakfast Casserole Recipe | Little Spice Jar (5)

Ingredients

  • 2 tablespoons oil
  • 8-10 mushrooms, sliced
  • 2 teaspoon minced garlic
  • ½ red onion, diced
  • 2 bell peppers, diced
  • 2 cups packed baby spinach, roughly chopped
  • 20 ounces shredded potatoes, thawed
  • 10 eggs
  • ⅓ cup half and half or milk (see notes)
  • ¼ cup hot sauce (more or less to taste)
  • salt and pepper
  • 1 cup shredded cheese (see notes)

Instructions

  1. In a large skillet over medium heat, heat 1 tablespoon of oil. Add the mushrooms and sauté them for 4 minutes or until they start to brown. Add a small pinch of salt along withe onions and garlic and let cook for 2 minutes. Remove to a plate. Add the second tablespoon of oil, if needed, and sauté the peppers for 1 minute. Add in the baby spinach and allow it to wilt, remove from heat, set aside.
  2. Generously spray a 9x13 baking dish with nonstick cooking spray. Lay the shredded potatoes in the bottom of the dish and press to make sure they are spread out evenly. Add the veggies (both the mushrooms and the pepper mixtures) over the potatoes, set aside.
  3. Position a rack in the center of the oven and preheat the oven to 375ºF if you are baking the casserole immediately.
  4. In a large bowl, whisk together the egg, half and half, hot sauce, and a big pinch of salt and pepper. Pour the egg mixture over the prepared veggies. Sprinkle the cheese over the topand another small pinch of salt and pepper.
  5. Bake the casserole, uncovered, until the cheese melts, and the top gets in and golden, 45-50 minutes. Allow the casserole to cool for 10 minutes before slicing and serving.

Notes

  • TO MAKE AHEAD - prepare the casserole as directed, cover with plastic wrap and refrigerate overnight or as required (not to exceed 24 hours) and allow it to come to room temperature for 20 minutes before baking.
  • The half and half can be replaced with any nondairy milk such as almond, soy, cashew, etc.
  • OTHER ADD INS - I kept this recipe vegetarian, but you can certainly add in browned sausage, ground turkey/beef, shredded chicken or ham. The cheeses I recommend for this casserole are cheddar (mild or sharp), mozzarella, and pepper jack, or swiss).

Have you made this recipe?

If you enjoyed this recipe, please consider leaving a ⭐️⭐️⭐️⭐️⭐️ rating and a comment below. You can also share a picture on Instagram with the hashtag #LITTLESPICEJAR, I'd love to see what you made!

IS THIS A GOOD CHOICE FOR YOU?

Make Ahead Veggie Breakfast Casserole Recipe | Little Spice Jar (6)

*Please note: the nutritional factscalculated are an estimate based on the ingredientsI’ve used.If you’d like a more accurate count, please calculate them using the ingredients/brands you’ve used to prepare the recipe. The nutritional factsprovided are for 1/12th of the recipe, assuming you use⅓ cup milk and cheddar cheese.

Make Ahead Veggie Breakfast Casserole Recipe | Little Spice Jar (7)

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Make Ahead Veggie Breakfast Casserole Recipe | Little Spice Jar (2024)

FAQs

Is it better to cook casserole the day before or? ›

Make-ahead meals (especially baked casseroles) are terrific because you can completely assemble them in advance and bake them just before serving. They're the ultimate comfort food as they come bubbling hot and delicious straight from the oven to the table to the delight of family and friends.

Do you cook vegetables before putting in casserole? ›

Soft vegetables like broccoli can be quickly par-cooked (aka blanched). If you are using hard vegetables like potatoes or carrots or other hardy root vegetables, you'll want to par-cook for longer. Often a quick 2-5 minutes in the microwave will just give them that great head-start.

What is the key to making a good casserole? ›

  1. Choose the right baking dish. If you're all about the crunchy topping, use a shallow dish. ...
  2. Undercook your pasta. ...
  3. Drain your meat. ...
  4. Beware of mushy vegetables. ...
  5. Know your cheeses. ...
  6. Master the art of casserole assembly. ...
  7. Don't skip the topping. ...
  8. Make it now, but bake it later.

Do you have to refrigerate breakfast casserole before cooking? ›

Success Tip: Refrigerate Overnight

During this time, the flavors mingle together and the bread has a chance to soak up some of the liquid and flavor. Wake up and all you have to do is slide it into the oven. If you're in a rush, I do recommend at least 30 minutes in the refrigerator before baking, if you can spare it!

How long to cook an uncooked casserole that has been refrigerated? ›

For example, assemble a vegetable casserole a day in advance, refrigerate and then bake the day of your dinner. Plan 15 to 20 minutes additional heating time for the refrigerated cold casserole. Heat until it's hot and steamy throughout (165 °F as measured by a food thermometer).

Do I bake my casserole covered or uncovered? ›

Generally, casseroles with grains, rice or pasta that will cook during the baking process are usually covered, for at least part of the time. Casseroles made of cooked ingredients are usually baked uncovered. If you like a crisper, browner top, be sure the casserole is uncovered for at least part of the bake time.

Why is my breakfast casserole watery? ›

This is often due to high water content in some vegetables and dense meats that are used in these dishes. Browning /cooking the meats (and draining off any excess liquid) and sautéing the vegetables before cooking often helps this issue.

What are three guidelines to follow when preparing casseroles? ›

Top tips for casseroles

Cut your ingredients, such as meat, potatoes and parsnips, into similar-sized pieces to ensure they cook evenly. Add any ingredients that cook quickly, such as broad beans, towards the end of cooking. To save time – and washing up – use a flameproof, ovenproof casserole dish.

Do you bake vegetables covered or uncovered? ›

There is no need to cover vegetables when roasting. Covering them creates steam, so they won't get as crispy and caramelized. Don't forget to stir once or twice while cooking so the vegetables get nicely browned on all sides. Other than that, you can't really go wrong.

What is the main ingredient in a casserole? ›

In the United States, a casserole or hot dish is typically a baked food with three main components: pieces of meat (such as chicken or ground meat) or fish (such as tuna) or other protein (such as beans or tofu), various chopped or canned vegetables (such as green beans or peas), and a starchy binder (such as flour, ...

How do you spice up a bland casserole? ›

Fresh herbs or citrus zest can also punch up flavors with a bit of welcome brightness for a long-cooked dish, as can adding some heat in the form of a dash of hot sauce, a generous pinch of minced or sliced fresh chili pepper, or a shake of red pepper flakes.

How do you know when breakfast casserole is done? ›

You can also check the doneness of an egg bake recipe by testing the internal temperature. When an instant read thermometer reads 160 degrees F, the breakfast casserole is done.

What is good to serve with breakfast casserole? ›

It can be made for breakfast, lunch, or dinner.

Serve it with some sliced fresh fruit on the side for breakfast, or if making for dinner, a green salad. If you omit the veggies in the casserole, consider serving some sautéed vegetables on the side. Or if leaving out the meat, some crispy bacon or cooked sausages.

Can you leave raw egg mixture in the fridge? ›

If you've got raw egg yolks or whites left over from a recipe which you don't want to waste (let's face it, why would you?), you can store them in the fridge as long as you plan to use them within the next few days.

How do you store a casserole overnight? ›

Cover with plastic wrap and refrigerate overnight. When ready to bake, heat the oven to 350 degrees. Remove the baking dish from the fridge and discard the plastic wrap.

How do you make a casserole not soggy? ›

Just because your casserole is starting to look a bit soupy doesn't mean it's beyond saving. In fact, all you need to do is add some pasta noodles or grains to your base. This trick works for the simple reason that both types of ingredients soak up water as they cook.

Can you leave casserole to cool overnight? ›

Many casseroles seem to improve in flavour if kept overnight (cool them quickly and keep them in a refrigerator, by the way, once they're cold). This means it's quite possible to make two casseroles while the oven is in full swing, and keep one for the next day.

How long to bake a pre cooked casserole? ›

Transfer the leftovers to an oven-safe baking tray, cover with foil, and place in a hot oven (350ºF). Heat for 10-20 minutes, or until hot throughout. If there is a cheesy or crispy topping, remove the foil for the last 5 minutes.

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