Harvest the leaves when they're ripe and ready - their texture will be plump and firm and their colour a vivid, bright green.
Sort through the methi leaves, discarding of any rotten or dead ones
Wash them well, removing any dirt or impurities
Shake them well, wicking away all the moisture, and chop them finely
Lay your leaves out on a clean, dry tea towel and cover with another lightweight cloth or towel
Place them in a safe place in the direct sun and allow them 2-3 days of full-sun exposure to dry out
Rub the leaves between your clean, dry hands to create a powder and store in an airtight container for up to 6 months