Chicken with Mushrooms

If you had been a pilgrim coming through France, on foot, of course, or possibly by horse, donkey or pony, wearing your scallop shell as regular pilgrims did, you would probably have made the tortuous journey over the Navarre Pyrenees, on the north-east border of Spain. You would have stumbled down into the enclosed valleys, passed the stone houses with steeply pitched slate roofs, wandered through the Irati Forest, climbed over the limestone mountains, the Andei, the Urbassa et al, and dro