Pizza Burgers

2 pounds ground beef
1/2 cup minced onion
1 teaspoon salt
1/2 teaspoon oregano
1/4 teaspoon pepper
8 ounces pizza sauce
6 slices of cheese
3 large english muffins, split

Mix together the ground beef, onion, salt, oregano, pepper and 1/2 of the pizza sauce. Shape into 6 patties. Broil until done. Spoon remaining sauce on top and top with slice of cheese. Return to broiler to melt cheese. Serve on toasted muffin half.