Preheat the oven to 180 degrees C. Grease a rimmed baking sheet with cooking spray. Place the grated Parmesan on a plate and add the garlic powder, onion powder, lemon zest, parsley and paprika.
Rinse the fish in cold water and rub your thumbs along the surface to see if there are any bones to remove. Pat the fish dry with paper towels.
Melt the butter in a small pan on the stove or microwave it in a bowl, add passata and mushed anchovies. Set up an assembly line from left to right with the fish, the butter, the cheese mixture, and the sheet pan.
Use a fork to dip each piece of fish in the butter on both sides, then in the cheese mixture, coating both sides and patting the topping onto the cod with the fork. Place the coated fish onto the sheet pan, top with any excess melted butter and bake for 15 minutes. The cod is done when it can be easily flaked with a fork.
Squeeze lemon juice over the fish when ready to serve.
Jaz Culinary 