Lily bulbs taste a little similar to a softer, starchier water chestnut. It has a lightly nutty, flowery taste which many people enjoy, but I actually find it a bit off-putting. That's why I prefer cooking it with a garlic glaze as in this recipe because I can enjoy that starchy texture with only a hint of the "lily fragrance." Lily bulbs aren't overwhelmingly flavorful but they have a unique, delicate taste that can absorb and complement other flavors well.