Go Back
–+ servings

Make-Ahead Breakfast Casserole

BakedBreakfast & BrunchCasseroleCheesyChristmasClassicCreamyCrunchyDiner-StyleEggGluten-FreeHeartyHolidayKid-FriendlyPorkPotluckPrep-AheadSavorySpecial OccasionThanksgivingVegetableWinter
Time :1 hour 30 minutes
Yield :12 servings
Print
Share :

Recipe Background

A make-ahead breakfast casserole brings calm to a first real estate open house, offering convenience and flavor.
On the morning of my first open house as a real estate agent, a wave of nervous energy had me awake at 5 a.m. My kitchen was an array of half-packed boxes and mismatched mugs, remnants from a recent move. In the fridge, a few ingredients sparkled with delicious potential. A make-ahead breakfast casserole seemed like the golden ticket to starting the day on the right foot.
Out came the skillet and my favorite wooden spoon, ready to work their magic on sausage and a sprinkle of dried rosemary. The clever sizzle of oils and spices welcomed me to this new chapter, filling the tiny apartment with aromas sharp enough to slice through early-morning jitters. Cubed bread, crusty and eager, formed the base of the eventual masterpiece. The sausage, peppers, and mushrooms melded beautifully, crowned by a shower of spinach confetti. Perfecting the blend, I whisked eggs and cheddar, folding them gently into the bubbling mix.
Chef's tip: let the casserole rest before baking to really enjoy the flavors. As we moved into the day, this dish proved to be not just food but fortitude—an edible confidence booster. By the time I walked out the door, with my casserole finally done and ready to be devoured, I felt more prepared to face the world and its unpredictable demands. Just like the bread and eggs coming together into something more, I was crafting a distinctive layer of my own life.

Ingredients

For the casserole:

  • 4 cups bread cubed and crusty
  • 1 teaspoon olive oil
  • 1 pound ground pork sausage casing removed
  • 1 teaspoon dried rosemary or Italian seasoning optional
  • 1/2 medium onion diced
  • 2 cloves garlic minced
  • 2 cups bell peppers diced
  • 1 cup mushrooms sliced
  • 1 cup fresh spinach roughly chopped
  • 12 large eggs
  • 1/4 teaspoon salt plus more to taste
  • 1/8 teaspoon ground black pepper plus more to taste
  • 2/3 cup milk or half-and-half
  • 1 cup cheddar cheese shredded

For the garnish, optional:

  • green onion to taste
  • parsley chopped, to taste

Directions

  • Grease a 9x13-inch or any 3-4-quart oven-safe dish.
  • Arrange the bread cubes in an even layer at the bottom of the prepared dish.
  • In a large skillet, over medium heat, heat the oil.
  • Add the sausage and the rosemary to the oil.
  • Using a wooden spoon or a rubber spatula, break up the sausage into bite-size pieces as it begins to cook.
  • Add the onion, garlic, peppers, mushrooms, and spinach to the sausage.
  • Cook the meat and veggies until the veggies are slightly softened and the meat is mostly cooked through, for about 5-6 minutes.
  • Carefully transfer the sausage and veggie mixture away from the heat and evenly layer it on top of the bread cubes.
  • In a large bowl, whisk the eggs, salt, pepper, milk or half-and-half, and cheese together.
  • Evenly pour the egg mixture over the sausage and veggie mixture.
  • Add more of the salt and pepper on top of the egg mixture, to taste.
  • Cover the casserole with plastic wrap or aluminum foil and refrigerate for at least 30 minutes and up to overnight.
  • Preheat the oven to 375 degrees F.
  • Allow the casserole to sit at room temperature for 10-15 minutes as the oven heats up.
  • Bake the casserole, uncovered, until the top is golden, the edges are crisp, and a toothpick inserted in the center comes out clean, about 40-45 minutes.
  • Allow the casserole to cool for 10 minutes.
  • Slice and serve.
×