1 c. refried beans
1/4 c. onion, chopped
1 1/2 lb. ground beef
8 flour tortillas
1 tomato, chopped
1 (4 oz.) can mild green chili peppers, drained, seeded and chopped
4 slices sharp American cheese
1 c. lettuce, chopped

Combine beans, 2 tablespoons of chili peppers, onion and 3/4 teaspoon salt. Add beef; mix well. Form into eight 5-inch patties. Cut cheese slices in half. Place 1/2 cheese slice on each beef patty. Fold to seal cheese inside. Grill over medium coals 5 to 6 minutes. Turn and grill 4 to 5 minutes more. Heat tortillas on grill. Serve burgers in hot tortillas. Add the lettuce, tomatoes and remaining chili peppers as desired.