Ginger features in the ancient Sanskrit text Kama Sutra, its pungent warmth said to fire desire, fertility and circulation. But why rely on just one stimulant when we can add earthy cumin, a favourite aphrodisiac for early Arabs, and a prick of bittersweet fenugreek, which is recognised by modern science as a libido-booster? Bring in a fortifying dose of iron-rich spinach too and you have a potent mixture, and indeed a lovely vegetable side dish (