Easy Breakfast Idea Baked Egg Casserole

If you are looking for an Easy Breakfast Idea, this Baked Egg Casserole is the ultimate morning crowd-pleaser. Loaded with savory breakfast sausage, crisp bell peppers, tender bread cubes, and plenty of melted cheddar cheese, this Easy Breakfast Idea Baked Egg Casserole comes together with minimal effort. Whether you are hosting a weekend brunch, prepping meals ahead for a busy week, or feeding a hungry family on a holiday morning, this warm and fluffy bake delivers comfort in every bite.

• Prep time: 15 minutes

• Cook time: 40–45 minutes

• Total time: 1 hour

• Servings: 8

Ingredients

• 12 large eggs

• 1 cup whole milk (or heavy cream for extra richness)

• 1 lb (450g) ground breakfast sausage

• 3 cups day-old bread, cut into 1-inch cubes (brioche, sourdough, or French bread work best)

• 2 cups shredded sharp cheddar and Monterey Jack cheese, divided

• 1 medium red bell pepper, diced

• 1 medium green bell pepper, diced

• ½ medium yellow onion, finely chopped

• 2 cloves garlic, minced

• 1 teaspoon Dijon mustard (optional, for depth of flavor)

• ½ teaspoon salt

• ½ teaspoon black pepper

• 2 tablespoons fresh parsley, finely chopped (for garnish)

Step-by-Step Instructions

1. Prep the oven and baking dish: Preheat your oven to 180°C (350°F). Lightly grease a 9x13-inch baking dish with butter or non-stick cooking spray.

2. Cook the sausage and vegetables: Place a large skillet over medium-high heat. Add the ground breakfast sausage and cook for 5–7 minutes, breaking it apart with a wooden spoon until browned. Add the diced red bell pepper, green bell pepper, and onion to the skillet. Sauté for another 3–4 minutes until the vegetables are slightly softened. Stir in the minced garlic for the last 30 seconds, then remove from heat and drain any excess grease.

3. Layer the base: Spread the cubed bread evenly across the bottom of your greased baking dish. Spoon the cooked sausage and pepper mixture over the bread, then sprinkle 1 ½ cups of the shredded cheese on top.

4. Whisk the egg mixture: In a large mixing bowl, whisk together the eggs, milk, Dijon mustard, salt, and black pepper until completely smooth and well combined.

5. Assemble the casserole: Slowly pour the whisked egg mixture evenly over the bread, sausage, and cheese layers. Gently press down on the bread cubes with the back of a spatula so they soak up the egg custard. Top with the remaining ½ cup of shredded cheese.

6. Bake until golden: Place the dish in the preheated oven and bake uncovered for 40 to 45 minutes, or until the center is set, the edges are golden brown, and a knife inserted into the middle comes out clean.

7. Rest and serve: Remove from the oven and let the casserole rest for 5–10 minutes so it slices cleanly. Sprinkle with freshly chopped parsley, slice into squares, and serve warm.

Tips for the Best Casserole

• Make it overnight: Assemble the entire casserole the night before, cover it tightly with foil or plastic wrap, and refrigerate. In the morning, pull it out while the oven preheats and add 5–10 minutes to the total baking time.

• Use slightly stale bread: Fresh, soft bread can become soggy. Letting your bread cubes sit out on a baking sheet for a few hours (or lightly toasting them in the oven for 5 minutes) helps them hold their structure while absorbing the egg mixture.

• Customize your add-ins: Swap the sausage for crispy bacon or diced ham, or make it vegetarian by adding sautéed mushrooms and baby spinach.