Pkhali are the walnut-bound vegetable pâtés that open almost every Georgian feast, the supra, from Tbilisi to the villages of Kakheti. Spinach is the best known, though beetroot, beans, leeks and nettles are made the same way, and in Lent they become the heart of the meal. The cooked greens are chopped fine with walnuts, garlic, coriander, vinegar and spices, shaped into small balls and pressed with a criss-cross, then dotted with pomegranate seeds. Eat them cold with mchadi or bread. The common mistake is not squeezing the spinach hard enough, which makes the pkhali loose and watery. Chef's tip: they taste much better the next day, once the garlic and vinegar have soaked into the walnuts, so make them a day ahead.