Best Vegan Breakfast Casserole

Kickstart your morning with a delicious Vegan Breakfast Casserole packed with fresh veggies and a crispy breadcrumb topping that tastes SO good. It’s an easy, satisfying, and healthy way to enjoy a plant-based meal that everyone will love. I’ll show you how simple it is to make this tasty dish and enjoy a great start to your day.

A close-up of a person serving a portion of creamy baked breakfast casserole topped with breadcrumbs and herbs from a white dish.
Vegan Breakfast Casserole. Photo Credits: Two City Vegans
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There’s nothing I like more than to gather the family around the table first thing in the morning and share the most important meal of the day together, and this Vegan Breakfast Casserole is an important part of the meal. I love how I can prep it ahead, making mornings easier and less rush. It’s always a hit at Thanksgiving, Christmas, and Easter, but also on New Year’s Day and Mother’s Day. And it’s one of the first things to be eaten when I take it to a potluck!

Ingredients You’ll Need

You’ll need all the ingredients in the photograph below.

Various ingredients labeled and arranged on a surface, including mushrooms, red bell pepper, almond milk, panko breadcrumbs, olive oil, red onions, parsley, nutritional yeast, vegan butter, baby spinach, pepper, cornstarch, and salt.
Vegan Breakfast Casserole Ingredients. Photo Credits: Two City Vegans

How to Make Vegan Breakfast Casserole with Step-By-Step Instructions

Scroll down for the full recipe card containing a full printable recipe and measurements in both US customary and metric units.

You will love how easily this breakfast casserole comes together.

First, preheat your oven to 350°F/180°C.

Sauté the Vegetables

Heat a non-stick skillet over medium-high heat and add the olive oil. Toss in the sliced mushrooms, chopped red bell pepper, baby spinach, and chopped red onion. Sauté for a few minutes until all the veggies are tender.

A skillet contains sliced mushrooms, diced red bell peppers, and chopped red onions, ready to be cooked.
Heat olive oil in a non-stick skillet over medium-high heat.
A frying pan with sliced mushrooms, diced red bell peppers, and chopped red onions cooking together.
Add the mushrooms, red bell pepper, baby spinach, and red onion.
A pan filled with sliced mushrooms, fresh spinach, diced red bell peppers, and onions being sautéed together.
Sauté until all vegetables are tender.

Prepare the Sauce

In a small pot, melt the vegan butter and stir in the cornstarch. Cook for a couple of minutes until it becomes creamy. Gradually add the almond milk and nutritional yeast, stirring until the sauce thickens. Then, season with salt and pepper to your liking.

Remnants of scrambled eggs are left in a black frying pan, with some traces of grease visible.
Melt the butter and stir in the cornstarch.
A black skillet filled with a mixture of milk and a yellow powder, possibly preparing a dish.
Add the almond milk and nutritional yeast.
Close-up of a pot filled with thick, beige batter with bubbles and small chunks visible. The pot rests on a white surface.
Stir until the sauce thickens.

Make the Breadcrumb Topping

In a bowl, mix the panko bread crumbs with the melted vegan butter until well combined.

A person pours melted butter into a bowl of breadcrumbs. In the background, a dish with sautéed mushrooms, spinach, and red bell peppers is partially visible.
Mix the panko bread crumbs with the melted vegan butter until well combined.

Assemble the Casserole

Grease a casserole dish and add the sautéed vegetables. Pour the creamy sauce over the veggies, then top with the panko bread crumb mixture. Pop the casserole in the preheated oven for about 10 minutes or until the panko is golden brown.

A baking dish filled with sliced mushrooms, red bell peppers, spinach, and diced onions.
Add the sauteed vegetables in a greased casserole dish.
A rectangular baking dish filled with unbaked casserole mixture, containing visible slices of mushrooms, red bell peppers, and spinach, on a light speckled surface.
Pour the sauce over the veggies.
A rectangular baking dish filled with an uncooked casserole topped with bread crumbs, ready for baking, placed on a light gray surface.
Top with the panko bread crumb mixture and bake for 10 minutes.

Garnish with a sprinkle of fresh parsley, serve hot, and enjoy!

A rectangular baking dish filled with baked breakfast casserole topped with a golden-brown breadcrumb crust and garnished with fresh parsley, resting on a wooden cutting board.
Garnish with parsley and serve hot!

Recipe Notes and Expert Tips

The difference between a real recipe site like this and an AI-generated one is that I test the recipe thoroughly before I add it to my website – the AI website owners just don’t care if you waste your money and time on a recipe that doesn’t work.

Here are some tips from my testing so that you don’t make mistakes and have a perfect breakfast casserole every time.

  • Prep Ahead: Save time in the morning by chopping all your vegetables the night before and storing them in the fridge.
  • Uniform Chopping: Ensure all your veggies are chopped uniformly for even cooking.
  • Thickening the Sauce: If the sauce isn’t thickening as you’d like, let it simmer a bit longer while stirring continuously.
  • Season Generously: Taste your sauce before adding it to the casserole and adjust the salt and pepper to suit your preference.
  • Flavor: For a richer flavor, use a mixture of almond milk and coconut milk.
  • Crispier Topping: For an extra crispy topping, broil the casserole for the last 2-3 minutes of baking, but keep an eye on it to avoid burning.
A plate of baked breakfast casserole with vegetables and a breadcrumb topping, placed on a green plate with a fork and knife. A dish with more casserole and herbs are in the background.
Vegan Breakfast Casserole. Photo Credits: Two City Vegans

How to store Vegan Breakfast Casserole

To keep your Vegan Breakfast Casserole fresh, let the casserole cool and then transfer any leftovers to an airtight container and store them in the refrigerator. It will stay good for up to 3-4 days. When you’re ready to enjoy it again, simply warm the entire casserole in the oven at 350°F (180°C) until heated through.

If you prefer, you can also freeze the casserole for longer storage. Wrap it tightly in plastic wrap and foil before freezing. Just thaw it overnight in the fridge and reheat it as usual. This way, you’ll have a tasty meal ready whenever you need it.

What to Serve With Vegan Breakfast Casserole

I love to eat this breakfast casserole with homemade vegan sausages and hash browns; it’s such a filling and tasty meal.

If my family craves something sweet after breakfast, their eyes always light up when I serve Vanilla Donuts or Chocolate Donuts. And to make it a little more healthy, we wash them down with an Immunity Booster Juice.

A plate of baked breakfast casserole with a golden breadcrumb topping, containing visible ingredients such as vegetables and greens, with a fork next to it. Fresh herbs are in the background.
Vegan Breakfast Casserole. Photo Credits: Two City Vegans

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A close-up of a person serving a portion of creamy baked breakfast casserole topped with breadcrumbs and herbs from a white dish.

Best Vegan Breakfast Casserole

Start your morning with a tasty Vegan Breakfast Casserole packed with fresh veggies and a crispy breadcrumb topping. Easy to make and perfect for any occasion, it’s a healthy plant-based meal everyone will love. Prep it ahead to make mornings easier, and enjoy it during holidays or family gatherings. Always a hit at potlucks!
Prep Time: 20 minutes
Cook Time: 10 minutes
Course: Breakfast
Cuisine: American
Keyword: Vegan Breakfast Casserole
Servings: 6
Calories: 212kcal

Ingredients

  • 2 tablespoons olive oil
  • 1 cup mushroom sliced
  • 1 red bell pepper chopped into big pieces
  • 2 cups baby spinach chopped
  • 1 red onion chopped
  • 2 cups almond milk
  • 2 tablespoons vegan butter
  • 2 tablespoons corn starch
  • 2 tablespoons Nutritional yeast
  • Salt and pepper
  • 1 cup panko bread crumbs
  • ¼ cup vegan butter melted
  • Fresh parsley to serve

Instructions

  • Preheat the oven to 180°C (350°F).
  • Heat a non-stick skillet to medium-high and add the olive oil. Add the mushroom, pepper, spinach and red onion and sauté for a few minutes, until all the veggies are tender.
    2 tablespoons olive oil, 1 cup mushroom, 1 red bell pepper, 2 cups baby spinach, 1 red onion
  • Add the vegan butter and corn starch in a small pot, and cook for a couple of minutes, just until creamy. Stir in the milk and nutritional yeast and cook until it thickens. Season with salt and pepper.
    2 cups almond milk, 2 tablespoons vegan butter, 2 tablespoons corn starch, 2 tablespoons Nutritional yeast, Salt and pepper
  • Mix the panko breadcrumbs with the vegan butter.
    1 cup panko bread crumbs, ¼ cup vegan butter
  • Grease a casserole dish and add the veggies, top them with the sauce, and cover with panko bread crumbs.
  • Bake for 10 minutes, or until the panko is golden brown.
  • Serve with parsley.
    Fresh parsley to serve

Notes

  • Prep Ahead: Save time in the morning by chopping all your vegetables the night before and storing them in the fridge.
  • Uniform Chopping: Ensure all your veggies are chopped uniformly for even cooking.
  • Thickening the Sauce: If the sauce isn’t thickening as you’d like, let it simmer a bit longer while stirring continuously.
  • Season Generously: Taste your sauce before adding it to the casserole and adjust the salt and pepper to suit your preference.
  • Flavor: For a richer flavor, use a mixture of almond milk and coconut milk.
  • Crispier Topping: For an extra crispy topping, broil the casserole for the last 2-3 minutes of baking, but keep an eye on it to avoid burning.

Nutrition

Calories: 212kcal | Carbohydrates: 15g | Protein: 4g | Fat: 16g | Saturated Fat: 3g | Polyunsaturated Fat: 4g | Monounsaturated Fat: 8g | Trans Fat: 0.1g | Sodium: 283mg | Potassium: 249mg | Fiber: 2g | Sugar: 3g | Vitamin A: 2097IU | Vitamin C: 30mg | Calcium: 134mg | Iron: 1mg
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