Preheat your oven 350 degrees. Line a baking sheet with parchment paper and set aside. Prepare a second baking sheet for the fish by spraying a wire rack with cooking spray and setting it on top of a baking sheet. Set aside.
In a food processor, combine the torn up bread and melted butter. Pulse until you have small pieces and the bread is coarsely ground. Place bread crumbs on the prepared baking she and bake for 15 to 18 minutes or until the crumbs are golden brown, rotating during baking if needed.
While the bread crumbs are baking, place 1/4 cup of flour in a pie plate. In a second pie plate whisk together the eggs, mayonnaise, paprika, onion powder, and flour. When the bread crumbs are done baking, toss them with fresh parsley and place them in the third pie plate.
Increase the heat on the oven to 425 degrees.
Working in batches of two pieces of fish at a time, coat them in flour, then the egg mixture, then the bread crumb mixture before placing them on the baking prepared wire rack/baking sheet. Repeat until all the fish is breaded
Bake at 425 for 18 to 25 minutes or until the fish reaches an internal temperature of 140 degrees.