The meat is cleaned from the skins and cut into 8 pieces across the muscle fibers. Add salt and fry in very hot oil. Remove to a warm plate. In the fat from frying sprinkle flour, stir and diluted with cold broth. The mixture boil and boil 4-5 minutes, add salt to taste and add the mustard, grated lemon rind, lemon juice and sugar and retired from the fire. Thicken with cream and seasoned with a pinch of pepper. The sauce is poured in the fillets before serving.