A feast for the eyes and the palate, this beautiful salad made with raw vegetables is packed with vitamins and minerals. The tuna adds enough protein to make a complete meal. If you often eat canned tuna, to reduce the risk of mercury contamination, choose an oil-packed light tuna, rather than white tuna (albacore) in water.
You can prepare the vegetables for the salad several hours ahead, just add the pita and lettuce at the last minute.