We've been making a couple quarts of yogurt weekly for the last two months and are really enjoying it. We've tweaked the time and temp a little and now have it perfected to our taste. I thought I'd give an update.
We heat a half gallon of whole milk (pasteurized, but not ultra pasteurized) up to 200 in the microwave. It takes about 18 minutes done in 6 minute batches, stirring in between. Cool it down to 110 in a cold water bath in the sink. Put about a quarter cup of the previous batch into each quart jar as a starter, add the milk, seal it and sous vide at 110 for 12 hours overnight. In the morning stir it a bit-- there's a little liquid to incorporate and lumps to work in. Chill for a few hours.
We really like the thinner consistency done this way. It's pourable but pretty thick. Tartness is just right.
I put about a tablespoon of warmed up jam in a dish and mix in the yogurt. The missus likes it plain or with some granola.
Not much to look at, but here's some with gooseberry jam mixed in.
Or fruit. Some dead ripe peaches.