This classic tuna salad recipe is a timeless favorite that never fails to impress. Made with simple ingredients, it's quick and easy to prepare. Start by draining a can of tuna and flaking it into a bowl. Add diced celery, chopped red onion, and a spoonful of mayonnaise. Season with salt, pepper, and a squeeze of lemon juice. Mix everything together until well combined. Serve the tuna salad on a bed of lettuce or between two slices of bread for a delicious sandwich. This classic version is perfect for picnics, lunches, or a light dinner.