Yoghurt can be used as a dressing or as a marinade to tenderise meats, as in tandoori chicken. It is often used in northern Indian curries to give flavour and texture and to temper the heat of chillies.
It can be used as a replacement for cream or crème fraîche in most recipes. However, yoghurt with a very low fat content has a tendency to curdle when used in hot dishes, so allow the dish to cool first and don’t let it boil once the yoghurt is added.