Tofu is soya bean curd which is rich in protein, calcium and vitamin B12. It is produced by boiling ground soya beans with water, straining them and then coagulating the mixture and pressing it. It is used as a meat substitute. The flavour is bland, so that it takes on the flavour of the food around it. The texture is woolly when in its softened form, but can be hardened by pressing and becomes more cheese-like in texture. It is a versatile foodstuff which can be fried, stewed or used in salads and sandwiches. If it is stored in the fridge it should be covered in water, which should be changed daily. However, it is quite perishable so don't keep it too long. It is suitable for vegans.