Easy Cheesy Sausage Puff Bake

Ingredients:
12 large eggs
1/3 cup sour cream
1 lb. sausage
1/4 lb. (4oz.) sliced fresh mushrooms
1 med. onion, chopped
2 medium tomatoes, chopped (about 1 cup)
2 cups cheddar cheese, shredded
2 cups monterey jack or mozzarella cheese, shredded

Preheat oven to 400. Beat eggs with sour cream with wire whisk until well blended. Pour into greased 13x9 pan. Bake 10 minutes or until egg mixture is softly set. Meanwhile, cook sausage, mushrooms and onion in large skillet until sausage is cooked through, stirring occasionally. Drain. Reduce oven temp. to 325. Spoon tomatoes over the baked egg layer, top with the sausage mixture. Sprinkle with cheeses. Bake an additional 30 minutes or until egg mixture is set in center.