Asafoetida has a pungent, unpleasant smell when raw, but when cooked it delivers a smooth flavour similar to leek or sautéed onion. It is made from the dried white resinous sap extracted from a variety of giant fennel which is difficult to handle, so starch is added to make it more manageable. Yellow Asafoetida is blended with turmeric and is used in Indian vegetarian cooking and low FODMAP diets.