Prepare the Cazuela Duck Leg Confit 5 to 7 days in advance. Remove from the refrigerator and let stand at room temperature for about 4 hours.
Crumble the dried cèpes into a bowl, add 5 tablespoons water, and soak for at least 20 minutes, until softened. Strain, pressing on the mushrooms to extract as much liquid as possible and saving the mushrooms and liquid s