
Drain the tuna as thoroughly as you can. Flake it into a bowl.
Top with the Greek yogurt, celery, pickles, red onion, lemon juice, mustard, parsley, salt, and pepper. With a fork, stir to combine. Taste and adjust the seasoning as desired. I usually add a few pinches of salt.
Serve as a sandwich or wrap, use for a Tuna Melt, place over salad greens, enjoy as a dip with crackers, or simply eat it right out of the bowl.