Fava bean season is winding down where I live. Time to make one of my favorite salads before the beans vanish. Favas and sheep cheese, sweet and salty, in the soft folds of butter lettuce. A sharp shallot vinaigrette brings it all together. Choose a sheep’s milk cheese you can shave with a plane. If it has peppercorns in it (like Bellwether Farms’ Pepato), so much the better.