Hamburger Parmiagiana

Ingredients:
1 lb ground beef
1 small onion, chopped
2 Tbsp grated parmesan cheese
½ tsp garlic salt
small jar of chunky-style spaghetti sauce
½ cup shredded mozzarella cheese
2 toasted hamburger buns

Mix beef, onion, parmesan and garlic salt.  Shape into four patties.  Cook over medium-high heat, turning frequently until done.  Reduce heat to medium and pour spaghetti sauce over patties.  Heat until warmed through.  Top each patty with some mozarella cheese and warm until melted.  Put one half of toasted bun on each plate and place patty with some sauce over the top.