Kefir is touted to be a health drink. It can also be made into kefir cheese.
To make kefir cheese, culture kefir with the grains a little longer than usual and until it separates. When it separates into curds and whey, stir it up and strain out the grains. Then let it sit on the counter for up to a week. It should separate again fairly quickly if your house is warm. The longer you leave it, the thicker the curds will get. Then you can use cheesecloth (I use a "nut mylk bag") to strain out more whey until you get the consistency you like.