
Preheat the oven to 350 and lightly grease a 9x13 casserole baking dish.
In a large skillet sauté the onion for a few minutes until translucent. Add the Spinach stirring it in with the onions until it has wilted. Remove from the heat and set aside to cool.
In a large mixing bowl whisk together a dozen eggs with a cup of milk.
Add one cup of cottage cheese, 6 ounces of crumbled feta, and 1/2 cup mozzarella. Stir to combine with the eggs and milk.
Mix in the fresh dill and some salt and pepper.
Then stir in the cooked spinach and onions.
Once everything is combined pour the mixture into your prepared baking dish. Bake at 350 for one hour.