Potato Salad and Mushroom San Choy Bao

In an attempt to spice up some leftover mashed potatoes, I added mushrooms fried in garlic and some lemon rind to some lettuce leaves. Unfortunately, although the lettuce I used (no idea what it is called) looked nice like little soup spoons, they were a little bitter and quite tough so I wouldn't recommend them. Stick with cos lettuce, you'll be a lot happier.