Make soak 24:00 the cod. Peel and wash the yam. Make cook it in slightly salted water. Poach cod and let cool it. Thin out the leaves of it.
Chop the cives ones finely, garlic, the onion and the pepper. Make return to them in jumping oiled. Add cod in the preparation.
Once the pieces of yams cooked, mincez to them finements. In a dish with buttered gratin, place a layer of yam, a layer of cod so on and finish by a layer of cod.
pour the sauce bechamel sauce and strew with grated cheese. Pass to average furnace during 15 min.
Your cod gratin to the yams is ready. Be useful hot. Good appetite.