I made this similarly, using Jalna yoghurt, and cream. I put it on really late, around midnight, so it went off at a reasonable hour of the morning. I was quite pleased with how it turned out, although next time I will try putting a bit less milk in as others have said elsewhere that it will make it a bit creamier/thicker if you don't put in a whole litre. I'll make it again, definitely. It's sort of sourish, greek yoghurt style, but there's also a hint of sweetness, so it's easily switched to a sweeter yoghurt if you stick some yummy jam, or honey, or similar into it.
