This Sausage and Egg Casserole is like a supreme pizza transformed into a cheesy breakfast bake! It's loaded with with veggies, Italian sausage, pepperoni, eggs and three types of cheeses! This crowd pleasing dish is simple to prepare, can be made in advance and is easily customizable! It's a kid-friendly recipe that is guaranteed to become a family favorite!Recipe can be scaled up or down by using the slider if you hover your mouse over the number of Servings.
Cook the vegetables: In a large skillet, heat olive oil over medium-high heat until shimmering. Add in the onion and peppers; then season generously with salt and pepper. Cook, stirring occasionally, until softened, about 5-6 minutes.
Add the sausage, then pepperoni: Add the sausage to the skillet and cook, breaking up any large pieces with the back of a spoon, until no longer pink, about 8 minutes. Stir in the pepperoni and season again with salt and pepper to taste. Remove from heat and let cool completely.Grease a 9x13’’ baking dish with non-stick cooking spray. Set aside.
Prepare the egg custard: In a medium bowl, whisk the eggs with 3 cups milk, mustard, heaping ¼ teaspoon pepper, and 1 teaspoon of salt. Set aside.
Mix the filling: In a large bowl, add the cubed bread, cooked and cooled sausage mixture, both shredded cheeses, and the scallions. Gently mix together.
Transfer casserole to pan: Pour the bread mixture into the prepared baking dish and use a large wooden spoon to evenly distribute bread in dish.
Add the egg custard: Pour the whisked egg mixture evenly over the bread. Use a wooden spoon as necessary to gently push down on the bread and casserole filling to that the cubes of bread are mostly submerged in the egg mixture.
Chill: Cover the baking dish with plastic wrap and refrigerate. For best results, refrigerate at least 6 hours and up to 24 hours.
Preheat the oven to 350 degrees F. If you have refrigerated the breakfast casserole, remove it from the fridge and let it sit on the counter while the oven preheats. Brush with milk: Uncover the casserole, discarding the plastic wrap. Use a pastry brush to gently brush the top of the egg and sausage casserole with the remaining 3 tablespoons of milk.
Bake uncovered for 45 minutes (SEE NOTES). Add burrata cheese: Carefully remove the breakfast casserole from the oven. Use your hands to break the burrata over the casserole, evenly distributing the cheese among the top. Bake again: Return to the oven and bake an additional 15-20 minutes, or until the breakfast egg sausage casserole is JUST set and the cheese is bubbly.
Cool slightly and then Serve: Remove from the oven and set aside to cool for 10 minutes before garnishing as desired and serving. Enjoy!
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Notes
Sausage: I used ground sweet Italian sausage, but you can use whatever type or flavor of sausage you prefer. If using sausage links, make sure you remove them from their casings before proceeding with the recipe.
Bread: You can substitute challah for the brioche bread. If you can’t find brioche or challah, you can substitute any type of bread you would like. However, for the most luxurious, rich mouthfeel I suggest a buttery bread similar to brioche or challah, such as potato bread or even Hawaiian rolls.
Stale vs. Fresh Bread: Make sure your bread is stale and at least a day old! Fresh bread will completely disintegrate into the egg and milk mixture! However, if all you have is fresh bread, don’t worry! You can just toast the bread to get the same results as stale bread. Place the cubes of bread on a sheet pan and toast them in a 250 degree oven for 5-10 minutes, or until the cubes are just barely starting to crisp on the outside.
Baking casserole: If the top of your breakfast strata starts to brown before the strata is set, you can lightly tent the strata with foil while baking. Just make sure to remove the foil from the strata and bake uncovered after you add the burrata cheese.
Burrata substitute: If you aren’t crazy about burrata, you can either nix it completely from the recipe or substitute whole milk ricotta, fresh mozzarella, or a mixture of both!
Nutritional information is an estimate based upon 8 servings. Exact nutritional information will depend upon brands used and precise measurements.