Spaghetti Squash with shells

2 small spaghetti squash (1 1/4 to 1 1/2 pounds) 4 ounces mozzarella cheese , cut into small cubes (1 cup) 3 medium Tomatoes , seeded and chopped (1 1/2 cups)[...]

2 small spaghetti squash (1 1/4 to 1 1/2 pounds) 4 ounces mozzarella cheese , cut into small cubes (1 cup) 3 medium tomatoes , seeded and chopped (1 1/2 cups)[...]

1 (2 -2 1/2 lb) spaghetti squash 1/4 lb ground beef 1/2 cup chopped onion 1/2 cup chopped green pepper 1/2 cup sliced fresh mushrooms 1 garlic clove , minced[...]