Easy Vegetarian Breakfast Casserole

This Vegetarian Breakfast Casserole is quick, easy and delicious. It can be prepped the night before and popped in the oven the next morning. It is also great as a left over.

This Easy Vegetarian Breakfast Casserole can be prepped the night before and popped in the oven the next morning. It is perfect for a Sunday Brunch or holiday breakfast. It also makes a great "breakfast for dinner" option.

I will admit that breakfast is always tricky, because grab and go items like my Carrot Cake Breakfast Cookies are the easiest! However, this quick and easy vegetarian breakfast casserole is so delicious and does not take much time to make. It can be prepped the night before and popped in the oven the next morning. It is perfect if you are serving a large group of people breakfast. It is also great as a left over!  I made this casserole last Monday and my entire family loved it. We enjoyed left overs of this dish on Wednesday at breakfast and I had a serving on Friday for lunch after a big workout.

Easy Vegetarian Breakfast Casserole

What ingredients do I need to make the vegetarian breakfast casserole?

This dish is loaded with fresh vegetables, similar to my Spinach and Sautéed Veggie Casserole recipe.Here is what you will need to make it:

  • English Muffins
  • Sharp Cheddar Cheese
  • Butter
  • Red Bell Pepper
  • Yellow Bell Pepper
  • Orange Bell Pepper
  • Onion
  • Mushrooms
  • Baby Spinach
  • Basil 
  • Eggs
  • Milk
  • Garlic Powder
  • Black Pepper 
  • Dijon Mustard

I use the 3 different colors of bell peppers because I love how colorful the casserole looks! However, if you want to keep it simple, you could stick to using just red bell peppers and add a cup and a half of them.

chopped and whole bell peppers, onions, spinach, eggs and mushrooms on an off white counter top

How do I make the vegetarian breakfast casserole?

Step 1: As I mentioned, this is very easy to make and can be prepared ahead of time. Start off by preheating the oven 325 degrees and prepare an 8x8 baking dish with cooking spray. Break up the English muffins and place them in the bottom of the dish. Sprinkle ½ cup of the extra sharp cheese over the English muffins.

Bread and shredded cheese in a white dish.

Step 2: Heat skillet over medium high heat and add the butter. When the butter is melted add the chopped bell peppers and onions. Sauté them for about 5 minutes or until they soften. Next, add in the mushrooms and sauté for 5 more minutes.

Sautéed bell peppers and mushrooms in a black iron skillet.

Then, add in the baby spinach and sauté until wilted, which will take 2 to 3 minutes.

Bell peppers, spinach, mushrooms and onions sautéed in a black iron skililet.

Step 3: Remove from heat and put the veggie mixture over the English muffins and cheese. Sprinkle evenly with basil.

Vegetarian breakfast casserole in white dish ready to go in the oven.

Step 4: Next, whisk together the eggs, milk, pepper, garlic powder and Dijon Mustard in a large mixing bowl.

Would you like to save this?

We'll email this post to you, so you can come back to it later!

Eggs and milk whisked in a glass bowl.

Pour the egg mixture over the veggies, cheese and muffins. Bake at 325 degrees for 1 hour or until edges of casserole start to lightly brown. Remove from oven and cool for 10 minutes before serving.

Baked vegetarian breakfast casserole

How do I store the vegetarian breakfast casserole?

The casserole can be stored in a covered dish in the refrigerator for 5 days. It makes a great left over dish! All you need to do is heat up a piece in the microwave or oven.

Can I prepare this ahead of time?

Yes, this is one of my favorite things about this dish. I like to serve this for a holiday brunch with my Strawberry Mimosa Recipe. It can easily be prepared the night before, then placed in the refrigerator covered. Pop it in the oven the next morning for a delicious family breakfast.

Breakfast casserole on a dish and in a white pan with one piece missing.

Quick and Easy Vegetarian Breakfast Casserole

This Vegetarian Breakfast Casserole is quick, easy and delicious. It can be prepped the night before and popped in the oven the next morning. It is also great as a left over.
3.34 from 3 votes
Print Pin Rate
Course: Breakfast
Cuisine: American
Prep Time: 15 minutes
Cook Time: 1 hour 15 minutes
Servings: 6
Calories: 268kcal

Ingredients

  • 3 English Muffins
  • ½ Cup Sharp Cheddar Cheese shredded
  • 1 tablespoon Butter
  • ½ Cup Red Bell Pepper chopped
  • ½ Cup Yellow Bell Pepper chopped
  • ½ Cup Orange Bell Pepper chopped
  • ½ Cup Onion chopped
  • 1 Cup Mushrooms sliced
  • 1 Cup Baby Spinach
  • ¼ Cup Basil thinly sliced
  • 6 Eggs lightly beaten
  • 2 Cups Milk
  • ½ teaspoon Garlic Powder
  • ½ teaspoon Black Pepper
  • 1 teaspoon Dijon Mustard

Instructions

  • Preheat oven to 325°
  • Lightly coat an 8x8 inch baking dish with cooking spray or butter
  • Break up English Muffins into chunks and place on bottom of dish
  • Sprinkle ½ cup of cheese over the English Muffins
  • Heat skillet over medium high heat and melt 1 tablespoon butter
  • Sauté peppers and onions in the skillet for 5-6 minutes, or until softened
  • Add mushrooms to skillet and sauté for 5 more minutes
  • Next, add 1 cup of spinach to skillet and sauté until wilted, about 2-3 minutes
  • Spread pepper, mushroom, spinach mixture on top of cheese and muffins, then sprinkle evenly with basil
  • In a large mixing bowl, whisk together eggs, milk, black pepper, garlic powder, and dijon mustard
  • Pour this combination over the veggies, cheese and muffins
  • Bake at 325° for 1 hour or until edges start to slightly brown
  • Serve warm!

Nutrition

Serving: 1g | Calories: 268kcal | Carbohydrates: 24g | Protein: 14g | Fat: 13g | Saturated Fat: 6g | Cholesterol: 187mg | Sodium: 328mg | Potassium: 483mg | Fiber: 3g | Sugar: 7g | Vitamin A: 2316IU | Vitamin C: 58mg | Calcium: 214mg | Iron: 2mg

So Tell Me...

Do you ever eat breakfast for dinner? What is your favorite healthy hot breakfast dish? Do you plan your breakfast ahead of time? 

As always, I would love to hear your thoughts in the comments section below. Please let me know if you try this Quick and Easy Vegetarian Breakfast CasseroleThank you so much for stopping by, have a great week!

 

PIN IT HERE↓

Pin for breakfast casserole post.

 

 

41 Comments

  1. I personally would eat this casserole for lunch or dinner! Looks yummy and I'm pinning it!
  2. Love how the English muffins are on the bottom. I am thinking the pieces would soak up the milk and liquid from the eggs. I am not a vegetarian yet, but slowly cutting back on meats, particularly red meats.. Am now down to a couple times a week, mostly fish. Thank you for sharing! :)
  3. Thank you for allowing me to share my links with all your great followers! I hope you can join me at #Overthemoon on Sunday, #RecipeShareParty on Thursday and #ThursdayFavoriteThings!
  4. Pingback: Running recap: the week of cross training
  5. Pingback: Running recap: back in the saddle
  6. Pingback: Mini Layered Easter Cakes & A Mary Berry Homeware Competition! - The Baking Explorer
  7. This is a breakfast that any parent would be proud to send their kids off for the day after eating. I am usually not that industrius in the morning but making it the night before helps.
  8. I dont know that I love anything more than a breakfast casserole! Honestly, I have also been thinking about going vegetarian, for at least a month, so this is a great recipe for me to save!
  9. I am not a morning person, at all. I love that this is easy to make and I'd probably make it ahead of time and bake it the next morning. Your ingredients sound so delicious. I love them all which is rare with me.
  10. I love this dish! I am not a big fan of eating meat first thing in the morning. I find that it drags me down and makes me more tired. I like a vegetarian option like this!
  11. I never seem to be able to get enough veggies into breakfast meals. This is an awesome recipe, with lots of veggies and good protein!
  12. I just became a vegetarian this November so this is PERFECT! Thank you for sharing, I was looking to add more to my recipe box, my son would love it.
  13. This looks awesome! I’m vegan as well as our kids but I’ve been looking for recipes for my hubby. I’m hoping he’ll go veg this year!
  14. This looks so tasty!! In 2018 I'm hoping to eat more vegetarian meals, in the effort of cutting out more and more meat, and so I'm so happy to see yummy, filling vegetarian recipes like this!
  15. We've been trying to focus on less meat and better nutrition these past couple of months. This is the perfect recipe for us and it's vegetarian, YAY!
  16. This looks delicious! I am always on the hunt for new breakfast recipes as that tends to have the least variety for me. I would have to take out the mushrooms (personally can't handle the texture) but otherwise this is awesome!
  17. Angela! I can't believe this is a Vegetarian dish! I looks delicious and filling. I would love to give this a try.
  18. umm YES PLEASE! Come feed me!!! Actually adding this to our breakfast schedule this week! OH my sakes. Totally drooling. LOVE this option for a vegetarian meal.
  19. YUM! What perfect timing for a healthy filling breakfast recipe. Love having this type of breakfast, sets you up for the whole day.
  20. yum- this looks delicious. I've recommitted to eating more plants and less meat. While this isn't 100% plant based, it looks like a really good option for our family!
  21. Oh this looks so delicious! I am starting to cook different kind of food and this one looks so easy to make.
  22. This looks so delicious! I am always looking for new ideas for breakfast. I love the idea of having vegetables for breakfast, great way to start the day!
  23. Delicious! I make it often. I’m trying it over hashbrown potatoes instead of English muffins this year. I think it will be amazing!

    5 stars

    1. I am so glad you enjoy it!!!! I think making it over hash browns, sounds amazing!! That is one thing I love about this recipe is how versatile it is. Happy Holidays!! :-)
  24. Forgive me for saying this but, how can you call this a vegetarian anything? Do you have cheese, butter, eggs, & milk? Aren’t these all from animals and not vegetables?😜 my husband is not a vegetarian so he loved this recipe. Throw in sausage and bacon and he’s in heaven.

    1 star

    1. So did you actually try this recipe or is the 1 star rating because you disagree with the definition of vegetarian? To get cheese, eggs butter and milk...one does not need to kill an animal. "Vegetarianism is the practice of abstaining from the consumption of meat (red meat, poultry, seafood, and the flesh of any other animal), and it may also include abstention from by-products of animal slaughter." Perhaps you are confusing vegetarian with vegan?
    1. @Jackier, yes, you can absolutely double this recipe! You don’t need to do anything special. This recipe is very forgiving, you can add things or leave things out, and it still comes out. Delicious!
3.34 from 3 votes (1 rating without comment)

Leave a Reply

Your email address will not be published. Required fields are marked *

Recipe Rating