Method
Cook your mussels in 50ml of water and once all the shells are open, sieve, but keep the liquid. Scatter the mussels around a cold plate allowing them to cool. Set aside but don’t refrigerate. Remove the meat from half the mussels.
The nage – a culinary term for an unthickened stock or sauce:
Roughly chop an onion, celery, carrot, leek, handful of parsley and dill stalks, then place in a saucepan. Add the fish bones, one pint of water, the mussels and oyster juices. Bring to simmer and keep simmering for 20 minutes. Do not rapidly boil. After the 20 minutes, strain your stock into a jug, then discard the bones and vegetables.