Cheesy Vegetable Breakfast Casserole with Bell Peppers
- Prep
- 15 min
- Cook
- 55 min
- Yield
- 12 servings
- Level
- medium
- Cuisine
- American
This hearty breakfast casserole combines fluffy eggs with colorful bell peppers, broccoli, and melted cheddar cheese in a satisfying baked dish. The whole wheat flour adds structure while half and half creates a creamy texture. Perfect for weekend brunches, holiday mornings, or meal prep when you want to feed a crowd. The vegetables add nutrition and vibrant color, while the double layer of cheese ensures every bite is rich and satisfying. Can be assembled the night before for easy morning baking.
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Method
8 steps- 1
Heat oven to 350 degrees and coat 9x13 baking dish with cooking spray
- 2
Toss onion, bell peppers, broccoli and 1 cup cheese into baking dish, spreading evenly
- 3
Whisk eggs, ground mustard, half and half and flour in medium bowl
- 4
Pour egg mixture over vegetables and cheese
- 5
Bake uncovered for 45 minutes
- 6
Remove and top with remaining cheese
- 7
Return to oven for 10 minutes
- 8
Allow to rest for 5-10 minutes before serving
Tips
Can be assembled the night before and refrigerated, then baked in the morning for easy entertaining.
Let the casserole rest 5-10 minutes after baking so it sets up properly and is easier to slice.
Use a mix of colorful bell peppers for the most appealing presentation and varied flavor.
Good to Know
Refrigerate covered for up to 3 days. Reheat individual portions in microwave or cover and reheat in 350F oven.
Assemble completely up to 24 hours ahead, cover and refrigerate. Add 10-15 minutes to baking time if baking from cold.
Cut into squares and serve warm. Goes well with fresh fruit, toast, or breakfast sausage.
Common Mistakes
Don't skip the resting time or the casserole will be too wet to slice cleanly.
Avoid overcooking as eggs can become rubbery - remove when center is just set.
Substitutions
Dairy-Free Swaps
Gluten-Free Swaps
General Alternatives
FAQ
Can I freeze this casserole?
Yes, bake completely, cool, wrap tightly and freeze up to 2 months. Thaw overnight and reheat covered at 350F until warmed through.
What if I don't have half and half?
Use equal parts heavy cream and milk mixed together, or just use whole milk for a lighter texture.
Can I add meat to this recipe?
Yes, cooked bacon, sausage, or ham work well. Add about 1 cup of cooked meat with the vegetables.