This delicious recipe is from the book Fresh Thai by Oi Cheepchaiissara. The cilantro roots add a depth of flavor that you should try if you can get them; if not, substitute cilantro stems (preferable) or leaves. Wonderful with steamed rice to soak up the sauce. The prep time is for shrimp that is already peeled and deveined. Serves 4 as an appetizer or 2 as a main dish.