Peel the turmeric and use a sharp knife to slice it in half lengthwise, and then across in very thin half moons.
Mix the turmeric slices with the ginger, green chili, and salt.
Squeeze in one or both limes, depending on how juicy they are.
Stir well and allow the mixture to marinate for 30 minutes.
Taste and adjust. If the turmeric is too intense or is bitter, add a teaspoon of oil, sugar, or both.
Will keep, covered and refrigerated, for days.
