OMG Billi Bi is so good.
At the restaurant, we started off making a mussel broth, by cooking the mussels just until they opened in white wine, shallot, and parsley. Strain this and reserve the mussels on the side. I think billi bi is traditionally served as a smooth soup without ingredients, but we'd sweat shallot, add the mussel broth, add cream, then a small amount of parsley and thyme, and then a liasion of egg yolk. Garnish with mussels.
