how is fish tested for doneness
Insert a slender metal skewer into the center. If it meets no resistance, the vegetable is cooked. You can also use the pierce test to check the doneness of fish fillets or planked fish. Insert a metal skewer through one of the narrow edges of the fish toward the center and leave it there for 15 seconds. If the skewer feels hot to the touch when you pull it out, the fish is cooked.