I read the article How To Make Ice Cream Without a Machine by David Lebovitz a while ago, and the information in it stuck in my head. When I was hungry and preparing my dinner, I came up with an idea to use his techniques to make a small one-person bowl of homemade frozen yogurt. Based on my experience, it seems to certainly be true that you won't be able to get crystals as fine grained as with an ice cream maker, so the results won't be perfect. But if you just want one bowl, this seems to be a reasonable technique to satisfy a craving. And it's probably impossibly to make such a small quantity in an ice cream maker.
Use flavored and sweetened yogurt (I used vanilla wallaby yogurt) since it was simple and easy, and its what I had around. But you could also flavor your own if you prefer--the other time I made frozen yogurt I drained plain full fat brown cow yogurt which I flavored with vanilla beans and used stevia to sweeten it.
Simply spoon some yogurt into a bowl and place in the freezer for 30 minutes. Then every 10 to 15 minutes there after thoroughly mix the yogurt so that you break up large ice crystals. The yogurt is done when it starts to have a thick body and can hold shape. For the 3/4 cup serving that I had, this took probably about an hour and a half.
I recommend placing the bowls in the freezer for 10 minutes before spooning the yogurt into them. The yogurt melts really quickly. This also doesn't store well, since the yogurt has a tendency to freeze into ice, so only make as much as you want to eat.
