This quick and easy Crustless Spinach Bacon Quiche recipe is a healthier, fuss-free alternative to the classic! Loaded with veggies and packed with bacon, this egg casserole is heavy on the flavor and lighter on the calories and carbs! It's the perfect option for breakfast, brunch and even dinner! Plus, it's a great way to use up your favorite vegetables, leftover meats and pantry spices!Recipe can be scaled up or down by using the slider if you hover your mouse over the number of Servings.
Preheat oven to 350 degrees Fahrenheit. Lightly grease a 9-inch deep dish pie pan (9x2-inch or equivalent) with non-stick cooking spray.
Cook onions: Melt butter in a medium skillet over medium-high heat. Add onions. Cook, stirring occasionally, until slightly golden and softened, about 5-6 minutes. Add the garlic, red pepper flakes and nutmeg. Season with a scant 1/4 teaspoon salt and 1/8 teaspoon pepper. Cook, stirring, for 30 seconds, or until fragrant. Immediately remove from heat.
Add spinach and bacon: Add spinach and bacon to the pan with the onions. Stir to combine.
Prepare filling: Transfer spinach mixture to prepared pie pan. Add 1 cup of cheddar and ¾ cup of gruyere. Stir to combine. Use a spatula or the back of a spoon to spread the filling out in an even layer.
Prepare the egg custard: In a medium mixing bowl, combine the eggs, half-and-half and mustard. Season with ¼ teaspoon salt and 1/8 teaspoon pepper. Whisk well to thoroughly combine.
Pour custard over spinach mixture + Top with more cheese: Pour the egg custard over the spinach and bacon mixture in the prepared pan. Use a spatula or spoon to gently press the filling down into the eggs. Sprinkle the remaining ¼ cup of each cheese evenly over the quiche.
Bake: Transfer dish to the oven and bake for 50-60 minutes, or until eggs are just set. Check for doneness by inserting a toothpick into the filling – it should come out clean. Note: If the top browns before the quiche is done baking, lightly tent the top of the dish with aluminum foil.
Cool & Serve: Remove quiche from oven and allow to cool on the counter for 10 minutes. Garnish, slice and serve quiche. Enjoy!
To easily and evenly cook bacon: Arrange oven rack to the middle shelf position. Preheat oven to 425 degrees Fahrenheit (or 400 degrees convection setting if you have it). Arrange bacon in an even layer on a wire rack lined baking sheet. Bake for 12-18 minutes or until cooked and crispy. (No need to flip bacon! If you are not using a convection oven, you may want to rotate the pan halfway through cooking if your oven has hot spots.)
Nutritional information is an approximation based upon 8 servings. Exact information will depend upon the brands of ingredients and precise measurements used.