A simple but nutritious way to prepare this lovely mollusc. The poaching/steaming/serving sauce should be simple but cooked slowly and with love. Mussels should be cooked very quickly and with respect. Use mussels in the half-shell. You'll probably buy them frozen. Defrost well and naturally beforehand. New Zealand green-lipped mussels are beautiful, and most other lovely plump mussels are delicious. The photo for this recipe was made with Saldana Bay mussels from the West Coast of South Africa.