Dry-fry the coriander and cumin seeds in a frying pan over medium heat for 2–3 minutes, or until fragrant. Allow to cool. Using a mortar with a pestle, or a spice grinder, crush to a powder.
Heat the oil in a large heavy-based saucepan or flameproof casserole dish over low heat and fry a few pieces of meat at a time until browned. Remove from the