Preheat the oven to 350 degrees F. Grease an 8x8 baking dish with avocado oil or butter and set aside.

In a mixing bowl, add eggs, cottage cheese, cheddar cheese, spinach, salt, and pepper, and stir until combined. Pour into prepared baking dish and bake for 40-50 minutes or until eggs are set and a toothpick comes out mostly clean when inserted in the center.

Allow to cool slightly before slicing into 6-8 pieces. Serve and enjoy or freeze in portions, wrapped in parchment, in an airtight container for up to 3 months.