M&S 2 Salmon Fillet Fishcakes Two melt in the middles salmon fillet fishcakes with a rich buttery hollandaise sauce centre. Only made from high-quality responsibly sourced fish. Oven cooks in 22 minutes. Serves 2. 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.