Place fiber One in blender along with any seasonings you like such as black pepper, onion powder, salt, etc. Grind to breadcrumb consistency. Place half of crumbs in dish and other half in mixing bowl.
Shred tuna and add to crumbs in mixing bowl along with other ingredients. Stir until mixed.
Line baking sheet with wax paper and form tuna into 8 mounds on paper. Let it sit at room temp for 15 minutes.
Coat the mounds in the dish of Fiber One crumbs and cook in skillet heated over medium heat and coated non-stick spray. Cook for about 3 minutes and flip.