Prepare chipotle ketchup: In small bowl, combine ketchup and TABASCO® Chipotle Sauce; set aside.
Prepare sliders: Preheat grill to high. Meanwhile, combine ground beef, scallions, TABASCO® Chipotle Sauce and salt in bowl; mix well. Shape mixture into eight 2-inch round burgers.
Grill burgers about 5 minutes, or until of desired doneness, turning once. Cut each cheese slice into 4 pieces. Top burgers with cheese; cook 1 minute longer or until cheese is melted.
To serve, cut each roll horizontally in half. Place leaf lettuce and cooked burger on roll. Serve with chipotle ketchup.
Makes 4 servings.