RUSSIAN CREAM (serves 8)
2 cups heavy cream or half-and-half
1 cup sugar
2 tsp unflavored gelatin
1/2 cup cold water
2 cups sour cream

In a small saucepan over medium high heat combine cream & sugar. Stir until sugar is dissolved, about 3-4 minutes.
In a glass measuring cup stir together gelatin & water until gelatin has softened. Pour into cream mixture & stir over medium heat until gelatin is fully dissolved (if you rub a bit between your fingers, you shouldn't feel the gelatin grains.) Pour into a serving bowl or mold & refrigerate at least 3 hours or overnight.~~
I served it with fresh strawberries but fresh peach slices would be excellent. I think it was also called by some other nationalities, too.

Thank you, Ginger. This seems as though it would be sour tasting from so much sour cream. Is it?

How about this one.

Here is a link that might be useful: Swedish Cream

It's not sour tasting but there's a bit of "tang" about it. It's very good. Not tart but not overly sweet.