Why have regular old tuna melts when you can flavor them up a bit? If you don't like pepper-jack cheese, you can substitute cheddar or co-jack. We just discovered these whole wheat thin buns (pictured above), but you can use whole wheat bread or buns or english muffins, if you wish. After many years, I've finally wised up and put the cheese under the tuna to avoid burning the roof of your mouth with hot cheese!
1 can (5 oz) water-packed tuna
2 ribs celery, finely chopped
2 heaping Tbl. low-fat mayo
1 heaping Tbl. dill pickle relish
1/2 tsp. onion powder
1 tsp. dijon mustard (any mustard would work here)
Mix these ingredients well. Place one slice reduced-fat pepper-jack cheese on each of 4 slices bread, or 2 split buns or english muffins. Divide mixture and spread over cheese. Broil in oven or toaster oven until bread is toasted and tops are lightly browned.