Heat oven to 400° F. Sprinkle fish with salt and pepper to taste & place in a baking dish that has been sprayed with a little oil. Melt 2 tbsp butter. Combine 1/2 c panko bread crumbs with the butter until well coated, spoon crumb mixture over top of the fish. Cover the top of the fish evenly. Bake 20 minutes if about 1 inch thick or until fish flakes with a fork. Sprinkle it with chopped fresh chives, and serve.