In a large bowl, combine the tuna, bread crumbs, celery, and onion. Also, add half of the mayonnaise, bell peppers, and seafood seasoning. Stir until the mixture is uniform and holds together, breaking up any larger pieces of tuna.
In a small bowl, combine the remaining mayonnaise, bell peppers, and seafood seasoning.
In a large nonstick skillet, heat the oil over medium heat. Form burgers from 1/3 cup portions of the tuna mixture. Cook the burgers in the skillet for two minutes per side or until heated through and golden brown.
Spread one half of each English muffin with equal portions of the mayonnaise. Place a burger, lettuce, and tomato on the coated English muffin half and top with the other half of the English muffin. Serve immediately.
