This dish is very simple and easy but you need to make sure you have the freshest ingredients.
First clean the mussels under cold water. Discard any open ones.
In the big pot melt the butter with oil. Sweat the garlic with shallots and chilli.
Add the mussels and shake the pot. Pour the wine and cover.
Cook for few min, shake few times and see if all mussels opened.
Mussels don't take long to cook. 5 min is max.
Turn off the heat, stir in the cream and sprinkle with parsley. Discard any mussels that didn't open. Serve with warm garlic bread and a glass of chilled white wine.