I use this so much in so many things, I thought I better have a recipe here to refer to in the future.
Thickened yogurt is so simple. You use fat free plain yogurt, put it in a coffee filter (or cheesecloth) inside a collender, over a bowl. You let it sit for a couple of hours or overnight.
It makes the yogurt thick, you can use it for marinating, for cooking, as a replacement for mayo, or anywhere you see a recipe that calls for greek yogurt.