1 1/2 lbs. ground beef 1 egg yolk 1/4 C. grated onion 1 large garlic clove minced 1/2 t. oregano 1 t. basil salt and pepper to taste 6 slices provolone cheese Mix together the beef, egg yolk, onion, oregano, basil, salt and pepper. Mix lightly, using your hands. Shape into 6 patties. Grill to desired doneness. Top with cheese. Serve in hamburger buns with your favorite toppings. Serves 6.