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Fireman’s Overnight Breakfast Casserole with Country Gravy

Fireman’s Overnight Breakfast Casserole with Country Gravy

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Breakfast for a crowd without the early morning wake up call.

If you’re searching for a hearty and delicious dish that will feed a hungry crowd for breakfast and that doesn’t require you waking before the sun to get it on the table in time, your search is over. This Fireman’s Overnight Breakfast Casserole does all of the above, and with a whole lot of flavor packed in.

Why is it named the way it is? Well, we suspect that it’s just the sort of breakfast that works perfectly at a firehouse. You mix everything up the night before, set it in the fridge to chill overnight, and pop it in the oven in the morning. And then wham – hot, meaty, cheesy, filling breakfast on the table for a whole hungry crew without any A.M. effort.

As far as breakfast casseroles go, this is kind of a unique one. There are no hashbrowns or home fries or biscuits involved. Just a whole lot of protein from eggs and sausage and cheese and a medley of flavorful veggies. (Which means it’s a great option if you eat low carb, and it’ll keep you full all through the morning.) It’s definitely a powerhouse of a breakfast.

Serves 8-10
30 minutes active, 24 hours inactive


For the casserole:
1 pound ground breakfast sausage
4 cups sharp cheddar cheese, grated
12 eggs
1 large onion, chopped
1 red bell pepper, chopped
1 cup heavy whipping cream
1/4 cup green onion, chopped
8 oz sliced mushrooms
Kosher salt and freshly ground pepper, to taste

For the gravy:
2 cups milk
1/4 cup all-purpose flour
1-2 tablespoons butter or oil
Kosher salt and freshly ground pepper, to taste


When ready to bake, preheat oven to 350°F. Lightly grease a 9×13-inch baking dish and set aside.

In a large skillet over medium heat, add the sausage, breaking it up with a wooden spoon. When meat has begun to brown, add onions, mushrooms, and bell pepper to the skillet and cook until vegetables have softened and meat is cooked through, 6-7 minutes. Stir in green onion and remove meat and vegetables from skillet and set aside to cool. (Do not drain skillet.)

While meat and vegetables cool, make the gravy:

Add butter or oil to undrained skillet. Once melted, whisk in flour and allow to cook for 2 minutes.
Gradually whisk milk in and cook until gravy thickens. Simmer 2-3 more minutes and season with salt and pepper. Cover and set aside (or put in a container to chill overnight).
In the prepared baking dish, crack eggs evenly across the bottom of the dish, keeping yolks intact. Poke a hole in each yolk with the toothpick and pour cream over the top of the eggs. Top with 1/2 of the cheese.
Spoon sausage mixture over the eggs and cream in the baking dish and then top with remaining cheese. Cover dish with foil and chill overnight.
Bake covered in preheated oven for 30 minutes. Remove foil and bake 30 minutes more. Serve with country gravy, and enjoy!
To reheat gravy: Put gravy into a microwave-safe container. Add a little bit of milk to loosen the gravy and heat in 45 second intervals, stirring in between, until gravy is hot. You can also heat over medium heat on the stovetop, thinned with a little bit of milk.

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