A classic family dish, this seafood pie is made with white fish, mussels and prawns in a light wine sauce, topped with a purée of potato that is baked to lightly golden in the oven.
Place the mussels in a cool place covered with a damp cloth. Shell and devein the prawns, following the method in the Chef’s techniques on.
In a pan, melt half the butter over low heat, then add the shallots, cover and cook for 2-3 minutes, or until soft. Add the leek and cook for 2 minutes, uncovered, then add a tablespoon o