In a large mixing bowl, combine the drained tuna, mayonnaise, Dijon mustard, honey, and apple cider vinegar.
Use a fork to flake the tuna into smaller pieces and mix thoroughly until all ingredients are well incorporated.
Add the diced red onion, celery, and chopped sweet pickles to the bowl. Stir to combine.
Season the tuna salad with salt and pepper to taste. Be sure to mix well after seasoning.
If desired, serve the tuna salad on a bed of lettuce leaves for an extra crunch.
Garnish with cherry tomatoes for a pop of color and additional flavor.
Store any leftovers in the refrigerator for up to 3 days.
For a healthier option, consider substituting Greek yogurt for mayonnaise or adding diced avocado for creaminess.