M&S 2 Breaded Plaice Fillets Flaky plaice fillets coated in golden farmhouse breadcrumbs. Bake in the oven for 15 to 19 minutes. Two per pack. Our M&S seafood products have been sourced from fisheries and fish farms in a way that minimises their ethical and environment impact, while guaranteeing you the highest quality, delicious seafood you’d expect from M&S.