After hundred years of preparing tuna sandwiches - learned during my cafe's apprentice days, i'm finally doing a healthier version of it by omitting the mayonnaise that goes into the entire tub. Omission of the liquid also better extend shelf life (4 days in refrigeration) of the sandwich with its wet cuts of celery, onions and peppermint leaves. A generous dash of pepper helps too.
Mustard sauce, nonfat salad dressings, salsa or nonfat mayonnaise is used instead as condiment, sparingly - just a few drops for taste.
Still too dry a sandwich for you? Heap up with slices of juicy tomatoes or green lettuces. Now eat.