And if you can't find Greek yogurt, you can make your own very easily. Simply put a paper coffee filter in a wire-mesh strainer or colander, position over a bowl large enough that the bottom of the strainer doesn't touch the bottom of the bowl (allow about 3 inches space between them), fill the filter with PLAIN (unflavored, unsweetened) yogurt (nonfat works as well as full fat), and let it drain in the fridge overnight. You can use the whey- I add it to soups for a little extra protein- so don't just throw it out. The yogurt will be nice and thick- like soft cream cheese, and with little of the tartness it had before draining. It makes a great bagel spread, BTW- just add herbs of choice, maybe some scallions. It's also a great thickener for gravies and sauces- I use it instead of sour cream to make stroganoff.