Beat well together 1 1/2 dozen eggs, 1 cup milk, 1 cup sour cream or Half and half, 2 teaspoons salt, dash pepper. Melt 1/4 pound butter in 9 x 13 inch pan. Add optional ingredients - chopped onions, diced green pepper, mushrooms or meat. Bake at 350 degrees for 35 minutes or until firm.