1. Layer the bottom of a greased 9x13 pan with sausage and top with tomatoes and avocados.
2. In a bowl, beat eggs and milk. Stir in all other ingredients. Pour hash browns and egg mixture over the sausage, tomatoes and avocados.
3. Bake at 350°F for 35-45 minutes or until well set. Top with extra Cheddar cheese immediately after removing from oven. Top with salsa or sour cream.