Description
This comforting Everything Bagel Breakfast Casserole transforms the classic flavors of your favorite bagel shop breakfast into one easy, crowd-pleasing bake. Perfect for brunches, holidays, or make-ahead weekday mornings, this hearty dish combines fluffy eggs, toasted bagel pieces, melted cheese, and colorful veggies in a warm, savory casserole that feels both cozy and indulgent. It’s simple to prepare, endlessly customizable, and guaranteed to bring everyone to the table with smiles.
Ingredients
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6 plain or everything bagels, cubed (preferably day-old)
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1 tablespoon olive oil or butter
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1 medium onion, finely diced
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1 red bell pepper, chopped
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2 cups baby spinach
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8 large eggs
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2 cups milk (or half milk, half half-and-half for richness)
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1 teaspoon garlic powder
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1 teaspoon onion powder
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Salt and black pepper to taste
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1 cup shredded cheddar cheese
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1 cup shredded mozzarella cheese
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2 tablespoons everything bagel seasoning (plus extra for topping)
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1 cup cooked chicken sausage or diced grilled chicken (optional)
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Fresh chives or green onions, for garnish
Instructions
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Preheat oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish.
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Cut bagels into cubes. If fresh, lightly toast in the oven for 8–10 minutes to dry them out.
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In a skillet, heat olive oil over medium heat. Add onion and bell pepper; cook until softened, about 5 minutes. Stir in spinach until wilted. Remove from heat.
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In a large bowl, whisk eggs, milk, garlic powder, onion powder, salt, and pepper until smooth.
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Spread half of the bagel cubes in the prepared baking dish. Layer with half the vegetables, half the chicken (if using), half the cheese, and a sprinkle of bagel seasoning. Repeat layers.
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Pour egg mixture evenly over the top, pressing the bagel cubes gently to soak up the liquid. Cover and refrigerate for at least 2 hours or overnight.
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When ready to bake, remove the casserole from the refrigerator and let sit at room temperature for 15–20 minutes.
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Bake uncovered for 45–50 minutes, until golden brown and the center is set.
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Let rest for 10 minutes before serving. Garnish with chives or green onions and a sprinkle of bagel seasoning. Serve warm.
Notes
- Prep Time: 20 minutes
- Cook Time: 50 minutes