Mary's Breakfast Casserole

Start your morning right with Mary’s Breakfast Casserole, a hearty, flavor-packed dish that’s perfect for feeding a crowd or meal prepping for the week. This customizable breakfast bake combines fluffy eggs, savory breakfast sausage, and vibrant sautéed vegetables like red bell peppers, onions, and spinach, all layered over day-old bread cubes for a satisfying base. Topped with melted cheddar cheese and baked to golden perfection, this casserole is a delightful balance of textures and flavors. With just 20 minutes of prep time and a make-ahead option, it’s the ultimate comfort food for weekend brunches, holiday mornings, or busy weekdays.

Nutriscore Rating: 40/100

Prep Time:20 mins

Cook Time:45 mins

Total Time:65 mins

Servings: 6

Ingredients

• 8 large eggs
• 1 cup whole milk
• 1 teaspoon salt
• 0.5 teaspoon black pepper
• 1 pound breakfast sausage
• 1 medium yellow onion, diced
• 1 medium red bell pepper, diced
• 2 cups baby spinach
• 2 cups shredded cheddar cheese
• 4 cups day-old bread, cubed
• 1 tablespoon butter, for greasing the dish

Directions

Step 1

Preheat your oven to 375°F (190°C). Lightly grease a 9x13-inch casserole dish with butter and set aside.

Step 2

In a large skillet over medium heat, cook the breakfast sausage until browned and fully cooked. Break it into crumbles with a wooden spoon as it cooks. Remove from the skillet and set aside.

Step 3

In the same skillet, add the diced onion and red bell pepper. Sauté for 3-4 minutes until softened. Stir in the baby spinach and cook for an additional 1-2 minutes, just until wilted. Remove from heat.

Step 4

In a large mixing bowl, whisk together the eggs, whole milk, salt, and black pepper until well combined.

Step 5

Add the cubed bread to the greased casserole dish, spreading it out in an even layer. Top with the cooked sausage, sautéed vegetables, and 1 1/2 cups of the shredded cheddar cheese.

Step 6

Pour the egg mixture evenly over the contents of the casserole dish, ensuring the bread is fully soaked. Gently press down on the mixture with a spatula if needed.

Step 7

Sprinkle the remaining 1/2 cup of cheddar cheese over the top.

Step 8

Cover the dish with aluminum foil and bake in the preheated oven for 30 minutes. Then remove the foil and bake for an additional 15 minutes, or until the casserole is set and the top is golden brown.

Step 9

Remove the casserole from the oven and let it cool slightly for 5-10 minutes before serving. Slice into squares and enjoy!

Nutrition Facts

Serving size	(27940.4g)

Amount per serving	% Daily Value*
Calories	90373.0

Total Fat 7857.3g	0%
Saturated Fat 2795.1g	0%
Polyunsaturated Fat 0.3g
Cholesterol 17632.8mg	0%
Sodium 235647.5mg	0%
Total Carbohydrate 975.2g	0%
Dietary Fiber 38.1g	0%
Total Sugars 54.6g
Protein 2930.6g	0%

Vitamin D 441.0IU	0%
Calcium 7406.3mg	0%
Iron 223.0mg	0%
Potassium 38837.2mg	0%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 81.9%

Protein: 13.6%

Carbs: 4.5%