maybe try frozen berries in the yogurt? they seep liquid so that would naturally sweeten the yogurt.
it was funny, i'm not a chocolate lover, but that little sprinkle of cocoa in the yogurt made it seem a whole different food, and with the berries just amazingly good.
As I ate the oysters with their strong taste of the sea and their faint metallic taste that the cold white wine washed away, leaving only the sea taste and the succulent texture, and as I drank their cold liquid from each shell and washed it down with the crisp taste of the wine, I lost the empty feeling and began to be happy and to make plans.
– Ernest Hemingway