Veggie Breakfast Casserole: The Ultimate Crowd-Pleasing Morning Masterpiece

Key Information

Prep time: 20 minutes

Cook time: 45 minutes

Total time: 1 hour 5 minutes

Servings: 8-12

Difficulty: Easy

Dietary Tags: Vegetarian, Gluten-Free

Equipment Needed

  • 9×13-inch baking dish
  • Large skillet
  • Mixing bowls
  • Whisk
  • Cutting board
  • Chef’s knife

Ingredients

Egg Base
  • 10-12 large eggs
  • ½ cup milk
  • 1 tablespoon olive oil
  • Salt and pepper to taste
Vegetable Mix
  • 2 bell peppers, diced
  • 1 large onion, chopped
  • 8 oz mushrooms, sliced
  • 5 oz fresh spinach
  • 2 cloves garlic, minced
Cheese Layer
  • 2 cups shredded cheddar cheese
  • Optional: ½ cup crumbled feta
Seasonings
  • 1 teaspoon Italian seasoning
  • ½ teaspoon garlic powder
  • Pinch of red pepper flakes (optional)

Method

1. Preheat and Prepare

Preheat oven to 375°F and spray baking dish with non-stick spray.

A sunlit kitchen counter with bright, chopped vegetables including red and green bell peppers, onions, mushrooms, and spinach, alongside a chef's knife and cutting board, with steam rising from a skillet in the background.

2. Vegetable Preparation
  • Heat olive oil in large skillet
  • Sauté onions and peppers until softened (5-7 minutes)
  • Add mushrooms and garlic, cook until moisture evaporates
  • Stir in spinach and cook until just wilted
  • Season with salt, pepper, and Italian seasoning
3. Egg Mixture
  • Whisk eggs, milk, and seasonings in large bowl
  • Ensure smooth, well-combined consistency

A 9x13 glass baking dish filled with colorful layers of sautéed vegetables and a golden egg mixture, topped with melted cheese, surrounded by fresh herbs and cooking utensils on a rustic wooden surface.

4. Assembly
  • Layer half the vegetables in baking dish
  • Sprinkle with half the cheese
  • Pour egg mixture evenly over vegetables
  • Top with remaining cheese and vegetables
5. Baking
  • Bake for 40-45 minutes
  • Check for golden top and set center
  • Insert knife – should come out clean

Crucial Tips

  • Cook vegetables thoroughly to remove excess moisture
  • Let casserole rest 5-10 minutes before serving
  • Can be prepared night before and refrigerated

Storage

  • Refrigerate up to 4 days
  • Freeze individual portions up to 3 months
  • Reheat at 350°F for 15-20 minutes

Variations

  • Dairy-Free: Use non-dairy milk and cheese alternatives
  • Low-Carb: Replace potatoes with cauliflower
  • Add protein: Incorporate cooked bacon or chicken

Common Mistakes to Avoid

  • Don’t rush vegetable cooking
  • Avoid overcrowding pan when sautéing
  • Check egg doneness carefully
  • Let casserole rest before cutting

Pro Chef Notes

  • Room temperature eggs create smoother texture
  • Use fresh herbs for extra flavor punch
  • Experiment with different cheese combinations

Nutritional Spotlight

  • High protein from eggs
  • Packed with vegetable nutrients
  • Gluten-free and vegetarian friendly

Congratulations! You’ve just created a breakfast casserole that’ll make everyone at the table say “Wow!” 🍳🥬

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