Cut the cod into 4 or 6 ounce portions. Tip: Cut the thick parts short and leave the thin part of the filet long. Fold the thin fillets in half so that they are the same thickness as the thicker portions. This will ensure all the fish filets are done cooking at the same time.
Preheat the oven to 400 degrees Fahrenheit and brush an 8" x 8" baking dish with 1 tablespoon of melted butter.
Place the fish into the baking dish, skin side up, and sprinkle with 1/2 teaspoon of salt.
In a small bowl, combine the panko crumbs, parmesan, Italian seasoning, and remaining salt. Mix until combined.
Pour 2 tablespoons of melted butter over the panko mixture and toss until the crumbs are evenly moistened.
Generously sprinkle the top of the fish with the panko bread crumbs.
Bake the cod for 18-25 minutes until the crumbs are golden brown, the fish flakes easily, and the internal temperature of the fish reaches 145 degrees F on a meat thermometer.
Serve the baked cod with fresh herbs, lemon zest, and a squeeze of fresh lemon juice.