Breadcrumbs: Add 1 heaped tbsp butter to a pan and melt over medium heat. Add Panko breadcrumbs and fry for 5mins, or until the breadcrumbs turn golden, stirring & shaking the pan frequently. Place in a dish to one side and leave to cool.
Seasoning: In a small pot or bowl combine 1 tsp paprika & salt with 1/4 tsp onion powder, garlic powder and white pepper. Place to one side.
Prep Fish: Slice fish into 12 large wedges. You're looking to get them around 1" x 4.5-5", which seems quite big, but they will shrink so cut them slightly larger than what you imagine them ending up like. Thoroughly pat the fish dry with paper towels, then speedily move on to the next step, as the fish becomes watery the longer it rests (can pat dry again just before dredging if you need to).
Coat: Line up 3 large shallow bowls. The first with flour with half of the seasoning mix. The second with 2 beaten eggs. The third with the toasted breadcrumbs, parmesan and the rest of your seasoning mix. One by one dip the fish into the flour, then into the egg and finally into the breadcrumbs, ensuring you fully coat at each stage (especially the breadcrumbs).
Bake: Space out on an oiled wire rack above a baking tray (don't cram together or they'll steam on each other as they cook). Spray them with oil, then pop them in the oven at 220C/425F for around 12-15mins, or until golden and crispy all over. Allow to rest for a few mins (they will crisp slightly more as they cool).
Serve: Finish with a pinch of extra salt (optional) then carefully remove from the wire rack and serve up!