Pre-heat oven to 180°C/350°F and grease baking tray.
Wash fish in a solution of vinegar and water.
Season fish with salt, pepper and garlic powder, set aside.
In a large pot boil yam until tender then drain and crush.
Stuff crushed yam into cavity of fish. Secure opening by sewing with needle and thread or use a skewer.
Place on greased baking tray and bake for 40 minutes.
Baste at regular intervals using Grace Fish and Meat Sauce, to retain moisture and improve flavour until done.
METHOD NOTE: Use a sterilized needle to secure fish cavity.
TO SERVE: Serve with steamed bammy or your favourite steamed vegetable.