Line a large baking sheet with parchment paper and lightly grease with cooking spray. Set aside.
Pat fish dry with paper towels and place on a cutting board. Slice the fish into 6 strips, about 1-1/2 inches wide by 3/4 inches thick. Pat dry again and set aside.
Prepare your coating. Add flour to a bowl and set aside. In a separate bowl, whisk together eggs and water until combined. Then, in a shallow dish, combine panko breadcrumbs with grated parmesan, salt, and black pepper.
Working one at a time, fully coat each piece of fish in flour, then egg wash, then breadcrumbs. Then lay fish flat on the prepared baking sheet.
Lightly grease the tops of the fish with cooking spray, then bake at 400 degrees F until cooked through (internal temp of 145 degrees F), about 10 minutes.
Serve immediately with homemade seasoned fries, lemon herb aioli, and a lemon wedge.