Preheat broiler. Combine tuna, coleslaw mix and green onions in medium bowl. Combine mayonnaise, mustard and dill weed in small bowl. Stir mayonnaise mixture into tuna mixture. Spread tuna mixture onto muffin halves. Place on broiler pan.
Broil 4 inches from heat 3 to 4 minutes or until heated through. Sprinkle with cheese. Broil 1 to 2 minutes more or until cheese melts.