In a large bowl, combine the tuna, onion, celery, 1/3 c. bread crumbs, eggs and seasonings. Stir until fully combined. (I love my Stainless Steel Mixing Bowls Set With Lids for easy prep and storage!)
Pour remaining 2/3 c. bread crumbs into a shallow dish. Pat about a tablespoon worth of tuna mixture into a round patty. Cover both sides with bread crumbs.
Pour enough oil into a skillet to cover the bottom. Heat over medium heat. Add the breaded patties and cook until browned, about 3 to 4 minutes per side.
Notes
Our favorite dip to serve with these Tuna Croquettes is a simple sauce of mayonnaise and mustard. Use about 1 tablespoon of mustard for each 1/4 cup of mayonnaise. So simple but so good, and it is perfect with the tuna!Also, this mixture tastes great formed into larger patties, fried as described above and served on a bun as a tuna burger.