To preserve, salt is added and the chesse soaked in milk whey. - Kareeshah . Similar to cottage cheese. Can also be made by adding a few drops of lemon juice to boiling milk and straining the resulting curds through muslin or cheesecloth. Yoghurt is strained through muslin to reduce water content, and salt is added. Keeps well if salted and kept covered by olive oil.
Milk is boiled and cooled to blood temperature.
A little stirred yoghurt is added and the mixture stirred and then well wrapped to keep warm. It is then left undisturbed for 5 - 6 hours. Yoghurt becomes sourer the longer it is kept. It has been used for feeding young infants. Soybean products - Natto.