Rinse the mussels in cold running water while you sauté the onion and bacon in oil for about five minutes.
Add the potatoes and stock and bring to a gentle boil for ten minutes.
Add the seafood and spices, and cook for five minutes.
Remove any unopened mussels and add the cream and pepper. Stir well and check the seasoning. Stir in the herbs and serve with a crusty baguette and green salad.