Remove from heat and let cool down to 110 degrees,
then whip in a couple tablespoons of yogurt starter.
(My family uses one lil' yoplait yogurt to make 2 gallons of yogurt, so technically, I should only need 1/4 of a container. But I tend to use between 1/4 and 1/2 for 2 quarts of milk. I'd rather error on the side of thick yogurt then have it turn out runny.)
Dan and I also like using yogurt to make smoothies with fruit.
(Okay, so Dan is actually the creator of the smoothies that are enjoyed at our house. He's the best smoothie maker EVER. no joke.)
I've also done a lil' experimenting with using yogurt in baking and it has turned out fabulous.
Hope you enjoy!