Spinach, Sausage and Tomato Egg Bake

package Gold'n Plump Apple Maple Breakfast Sausages, cooked according to package directions and cut into bite sized pieces

shredded frozen hashbrowns, thawed

onion, diced

white mushrooms, sliced

spinach, torn into bite sized pieces

shredded cheese, divided

tomatoes, diced

eggs

milk

salt and pepper