Ingredients:
4 cups of fresh spinach
1-2 tsp. olive oil (depending on your pan)
1 1/2 cups low-fat mozzarella
1/3 cup thinly sliced onions
8 eggs, beaten
salt and pepper to taste

Instructions:
Preheat oven to 375F. Spray an 8 1/2 inch by 12 inch glass or crockery casserole dish with olive oil or nonstick spray.

Heat the oil in a large frying pan, add spinach all at once, and stir just until the spinach is wilted, about 2 minutes. Transfer spinach to the casserole dish, spreading it around so all the bottom of the dish is covered. Layer the grated cheese and sliced onions on top of the spinach.

Beat the eggs with salt and pepper to taste. Pour the egg mixture over the spinach/cheese combination, and then use a fork to gently “stir” so the eggs, spinach, and cheese are evenly combined.

Bake about 35 minutes or until the mixture is completely set and starting to lightly brown. Let cool about 5 minutes before cutting. Serve hot.

From: https://www.kalynskitchen.com/2012/03/recipe-for-spinach-and-mozzarella-egg.html?m=1