1 pkg. Fri-Pats
1 (8 oz.) can tomato sauce
1 (2 oz.) can sliced mushrooms, drained
1/4 c. finely chopped onion
1/2 tsp. oregano
1/2 tsp. garlic salt
4 slices low fat mozzarella cheese
4 hamburger buns or hard rolls, split & toasted, if desired

Cook Fri-Pats as directed on package. Combine tomato sauce, mushrooms, onion, oregano and garlic salt; simmer gently, about 10 minutes to blend flavors. Spoon about 2 tablespoons sauce on each hot Fri-Pat. Top each with a slice of cheese. Sprinkle with additional oregano, if desired. Broil 3-4 inches from heat until cheese softens. Serve on hamburger buns or hard rolls. Spoon additional sauce over cheese, if desired.