M&S Collection Crab & Avocado Pots Atlantic crab meat in a tangy Marie Rose sauce layered with avocado, chilli and lime topped with white crab meat and a sprinkling of parsley. Ready to eat. Serves 2. Welcome to Collection from M&S, where exceptional quality and intricate attention to detail makes for something truly special. 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.