This Tuna Barbecue recipe is a simple dish made with canned tuna and is perfect for sandwiches.
Heat olive oil in a small saucepan; add celery and cook until softened over medium heat, approximately 5 minutes.
Add ketchup, Worcestershire sauce, brown sugar, apple cider vinegar and dry mustard. Stir and cook over low heat for 20 minutes, stirring occasionally.
Add drained tuna and heat through for 10 minutes.
Serve on buns.