Step 1

Lightly grease a 13 x 9-inch baking dish or a 9-inch springform pan with cooking spray and set aside.

Step 2

In a large mixing bowl, combine the eggs and milk; whisk the two until well blended.

Step 3

Stir in the crumbled bacon, ham, spinach, cheeses and ground nutmeg; season the mixture with salt and pepper.

Step 4

Add the bread; mix it all until thoroughly combined.

Step 5

Pour the mixture into previously prepared baking dish. Sprinkle with shredded cheese, if you are using the cheese topping.

Step 6

Cover the casserole with foil and refrigerate it overnight.

Step 7

Preheat the oven to 350 F.

Step 8

Bake the casserole uncovered for 50 minutes or until the eggs are cooked and the top is puffed and golden brown.

Step 9

Let it stand for several minutes before serving.