Khatkhatem is the vegetable stew Goan Hindu families cook for Ganesh Chaturthi and wedding feasts, when onion and garlic are kept out of the kitchen. It takes whatever the monsoon garden gives: pumpkin, sweet potato, raw banana, corn on the cob, drumsticks, yam and the long Goan cucumber, simmered with a little toor dal in a ground paste of coconut, red chillies and coriander seeds. The flavour comes from tirphal, a dried berry from the Western Ghats with a woody, citrusy, slightly numbing bite. Serve it with rice and a crisp papad as part of the festive spread. Chef's tip: add the vegetables in stages, hardest first; khatkhatem should have every vegetable tender but whole, not a mush.