Preheat oven to 375 degrees and spray an 8x11 baking dish with cooking spray.
Brown bacon in a medium non-stick skillet over medium heat, using a wooden spoon to ensure even browning. Cook until bacon is browned, about 7-9 minutes. Strain on to a plate lined with a paper towel. Remove all but 2 tablespoons of the bacon grease from the pan then add in spinach. Saute until spinach is wilted, about 3-4 minutes.
8 strips bacon, 8 cups spinach
While bacon and spinach are cooking, whisk eggs, water, salt and pepper in a large bowl. Add cooked, strained bacon and cooked spinach to the egg mixture and mix well. Pour mixture into prepared baking dish.
12 large eggs, 1/4 cup water, 1/2 teaspoon salt, 1/2 teaspoon pepper
Sprinkle pan with shredded cheese then bake until eggs are set, about 30 minutes. Serve warm or refrigerate for up to 7 days.
8 ounces shredded cheddar cheese
Notes
Feel free to customize this egg bake with any proteins, veggies or cheeses you have on hand!