It may be allowed to incubate for up to ten hours at a time for improved flavor (the tartness of the yogurt increases with incubation time) and texture.
2
Tartness will weaken as you process in canning so make sure it is a wee bit more tart than you like!
3
This recipe combines the tang of red wine vinegar with the tartness of tomatoes.
4
Try a vanilla, chiffon, or light lemon cake with orange curd between each layer to add tartness and contrast.