Before starting this Moules Marinière recipe, make sure you have organised all the necessary ingredients. Give the mussels a good scrub. Wash them thoroughly 2 or 3 times, then drain. Reserve in the fridge. Slice the shallots... ... and chop the parsley. Chop the garlic cloves. In a large pot, place the drained mussels. Add the sliced shallots... ... chopped garlic... ...