Fermented bean curd
Fu ru is made all over China, from Guilin's chilli-red cubes to Shaoxing's pale ones, and is usually prepared in the cool months between late autumn and early spring, when the moulds grow slowly and cleanly. Firm tofu cubes sit on rice straw or a rack until a soft white fuzz covers them; they are then rolled in salt and chilli and aged in brine until the centre turns custard-soft and the flavour becomes deep, cheesy and savoury. A quarter of a cube is mashed over plain rice congee for breakfast, or stirred into a sauce for stir-fried water spinach. Common mistake: making it in a warm kitchen; above about 20 °C the wrong moulds and bacteria take over. The bloom must be white or greyish-white and fluffy, smelling mildly of mushrooms; throw away any cube with green, black, pink, orange or yellow spots, sliminess or an ammonia or rotten smell, and if many are affected discard the whole batch. Do not reduce the salt: it is what keeps this low-acid soy ferment safe, and the whole ageing happens in the fridge. It is ready after 6–8 weeks, when a cube is soft right through. Chef's tip: press the tofu overnight first, drier cubes grow a cleaner bloom.
























