Blue Cheese Burgers(Top These Whoppers With Lettuce, Tomato And Onion)  
["1 1/4 lb. lean ground sirloin or round", "3 oz. Blue cheese, crumbled", "1 tsp. vegetable oil", "4 hamburger buns"]
["Divide beef into 8 equal portions.", "Pat each portion into 4 1/2 to 5 1/2-inch patties on waxed paper.", "Sprinkle cheese evenly on 4 patties, leaving 1/2-inch border.", "Top each one with another plain patty.", "Pinch edges together to seal."]
["lean ground sirloin", "cheese", "vegetable oil", "buns"]