A classic, creamy tuna salad with tender tuna, crisp celery and onion, and a bright lemon-Dijon dressing. Perfect for sandwiches, crackers, or lettuce cups and ready in minutes.
Use water-packed tuna for a lighter taste or oil-packed for a richer salad and reduce mayo slightly. Rinse and pat dry chopped onion to mellow its bite. Avoid overmixing to keep a flaky texture, and start with less mayo, adding as needed just to bind. Store in an airtight container in the fridge and use within 3–4 days; stir before serving and refresh with a little mayo or lemon if needed.