In addition to local meat and produce, last Saturday’s farmers’ market in West Tisbury featured some healthy local competition between two well-known Vineyard chefs. In the third annual Seafood Throwdown sponsored by the Northwest Atlantic Marine Alliance and the Dukes County Fishermen’s Association, chefs Jo Maxwell of Chesca’s in Edgartown and Teddy Diggs of Home Port in Menemsha met stove-to-stove in a stormy cook-off.