In a large bowl combine the tuna, red onion, relish, and celery.
16 ounces canned tuna, 1/2 small red onion, 2 stalks celery, 1/4 cup dill relish
In a small bowl whisk the mayonnaise with the lemon juice, salt, garlic powder, onion powder, and black pepper. Taste and add more salt and pepper to taste being careful to start out with just a little.
2/3 cup light mayonnaise, 1 tablespoon lemon juice, 1/2 teaspoon kosher salt, 1/2 teaspoon garlic powder, 1/2 teaspoon onion powder, 1/4 teaspoon black pepper
Stir the dressing into the main ingredients.
Serve right away or store in an airtight container for 3-5 days. Please note that if this salad sits out for more than 2 hours, the leftovers should be thrown away.