Wash the mussels under plenty of cold running water./ Discard any open ones that won’t close when lightly squeezed.
Pull out the tough, fibrous beards protruding from between the tightly closed shells, and knock off any barnacles with a large knife. Give the mussels another quick rinse to remove any little pieces of shell.
Soften the garlic and shallots in the butter with the bouquet garni, in a large pan big enough to take all the mussels – it should be half way full.
Add the mussels and wine or cider, turn up the heat, then vcover and steam them open in their own juices for 3-4 minutes. Give the pan a good shake every now and then.
Remove bouquet garni, add the cream and chopped parsley then remove from the heat.
Spoon in for large warmed bowls and serve with lots of crusty bread.