vegetable
Jerusalem artichoke
Measured by weight; no typical spoon or count conversion.
Instead of Jerusalem artichoke
PotatoUse the same weight, peel and cube; it gives a neutral body and similar cooking time, though you lose the nutty sweetness.
Sweet potatoUse the same weight, peel and cube; it softens a little faster, so add 5 minutes later, and expect a sweeter, softer curry.
Water chestnutUse the same weight, sliced; it keeps crunch but not the earthy flavour, so add in the last 10 minutes.
