Add the canned tuna (drained), mayonnaise, dijon mustard, lemon juice, celery, red onion, garlic, & a pinch of salt & pepper to a mixing bowl. Mix all the ingredients together until well combined.
Enjoy with bread (open faced or as a sandwich) or in lettuce cups or over crackers or cucumber.
Notes
Keep any leftovers stored in the refrigerator in an airtight container for up to three days.