Preheat oven to 425F.
Slice the fish into 1/2 inch x 2 inch strips or fingers.
In a medium bowl, stir together the mayonnaise, oregano, garlic powder, and salt. Mix until smooth and well combined. Separate the sauce in half and set half aside. *
Place the bread crumbs on a plate. Make an assembly line with 1/2 of the mayonnaise mixture and the breadcrumbs.
Gently roll the fish fingers in the mayonnaise mixture and then roll in the breadcrumbs to coat.
Place the coated fish on a metal rack that has been set on a baking sheet and sprayed with oil. Lightly spray the fish sticks with oil. Bake for 12-15 minutes, until the fish is flaky inside and golden brown outside. **
Use the second 1/2 of the mayonnaise mixture as a dipping sauce for the cooked fish.
* This may seem like a small amount of sauce, but the fish only requires a thin coating of it before rolling in the breadcrumbs . You’ll need to lightly press the fish into the mayonnaise mixture, or brush it on with your fingertips.
** If you have a convection oven, set it to 425F and cook the fish for 12 minutes.
** If using an air fryer, place fish in baking grate, set to 400°F and cook for 10 minutes or until golden.