I used to make these when I was on the Slimming World plan, they were free on a green day, but I don't know if Polenta is still free, better check if you are following SW. The texture is a little "grainy"...personally I don't mind that. They are very good when fresh from the oven, after that just zap in the microwave for a few seconds to refresh them. The basic recipe is a plain muffin and then I've listed a couple of variations. I don't know what flavours of yoghurt you have in the US so use your imagination!