
This delightful Bacon Spinach Breakfast Casserole featuring Gruyère cheese is an ideal choice for your upcoming holiday celebration, serving a large group, or preparing meals for the week ahead.
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Begin by heating your oven to 350 degrees Fahrenheit. Prepare a 9” x 13” casserole dish by spraying it with cooking spray and setting it aside for later use.
In a spacious skillet, fry the bacon over medium heat until it reaches a crispy texture. Once done, use a slotted spoon to transfer the bacon onto a plate lined with paper towels to absorb excess grease.
Carefully remove all but 2 tablespoons of the bacon drippings from the skillet, then introduce the shallots into the pan.
Cook the shallots, stirring them occasionally, until they emit a fragrant aroma and start to turn golden at the edges, which should take about 2 minutes.
Incorporate half of the spinach into the shallots, tossing them together, then add the remaining spinach and toss once more to combine.
Continue to cook, stirring frequently for roughly 3 minutes, until the spinach has wilted. Then, remove the skillet from the heat and set it aside.
In a large mixing bowl, beat the eggs until well combined.
Reserve 1 cup of cheese for later, then mix the remaining cheese into the eggs. Add in the milk, salt, pepper, the cooked spinach mixture, and the bacon, stirring until everything is evenly blended.
Transfer the egg mixture into the prepared casserole dish, then top it off by evenly distributing the reserved cheese over the surface.
Place the dish in the oven and bake for 35 minutes. After that, reposition the oven rack to the second slot from the top, turn the oven to broil, and cook for an additional 2-3 minutes until the top is nicely browned, keeping a close eye to prevent burning.
Let the casserole cool for 10 minutes before slicing it into 8 portions and serving right away.