This is super easy recipe and measurements can be adjusted according to party size.
Cook sausage until brown on medium heat. Chop tomatoes and saute with olive oil in seperate pan with sliced mushrooms and spinach. After a few minutes, add eggs. Just before removing and serving, sprinkle grated mozzarella cheese and remain cooking until cheese melts. Add salt and pepper to taste. Serve with hashbrowns, toast, etc.