My 22 year old son was looking for a way to cook up some halibut and found this in one of our cookbooks. It went together easily and he was very proud of the results. It was very flavorful and we plan to fix it again. From "How to Grill" by Steven Raichlen. Regarding the cilantro root -- my husband looked at every Asian market in the area to no avail thinking if anyone would have cilantro root they would. He felt it was essential to the recipe despite the recommendation of adding additional cilantro instead. He mentioned to me he had been looking for cilantro root -- "Did you think of the herb section of the nursery?" I bought a little 4-inch pot of cilantro from the herb section and washed the roots thoroughly (a chore, I will admit). Sometimes you can find cilantro with some of the roots attached, but rarely. You decide how labor intensive you want this recipe to be, but there is an option for you if you are looking for cilantro root.