Melt butter in cast iron skillet or pan over medium heat. Add diced onions, zucchini and tomatoes and cook over medium high heat for 5-7 minutes. If turkey is not cooked, cook it now.
Mix eggs, milk, 1 cup of cheese, ground turkey and spices in a bowl and whisk together.
Once veggies are cooked, pour the egg mixture into the pan! Don’t stir! Cover and allow to cook until the eggs cook through and the edges begin to set, about 5 minutes.
Transfer skillet or pan to the oven and bake for 5-7 minutes. Add additional cheese and pop it back in for 3 minutes, or until cheese melts.