Homemade yogurt is a good idea. I've been experimenting with sourdough starter (just made from flour and water, no need to buy a starter culture), will be soon making my own kimchi, and also plan to grow a scoby for making kombucha. We don't eat dairy since the husband can't tolerate it but he loves having yogurt, and it can add up every week, so maybe I can find a 'vegan' yogurt start culture. Thanks for the idea.