1 lb. ground beef
1 sm. onion
2 tbsp. Parmesan cheese
1/2 tsp. garlic salt
1 jar chunky spaghetti sauce
1/2 c. shredded Mozzarella cheese
4 slices French bread, toasted

Mix first 4 ingredients together. Shape into 4 patties. Cook in skillet to desired doneness. Drain. Pour spaghetti sauce over patties. Heat until hot. Top each pattie with Mozzarella cheese. Serve on French bread.