1 envelope (1 tbs) unflavored gelatin or 1 gelatin sheet
2 cups sour cherry pureed lightly
1/3 cup sugar
1/2 tsp vanilla essence
1 pot plain yogurt (unsweetened)
250 ml well-chilled heavy cream
In a small saucepan sprinkle the gelatin over 1/4 cup cold water, let it soften for 1 minute and heat the mixture over a low heat stirring until the gelatin is dissolved.
Blend together the sour cherry puree, the sugar and the vanilla, add the gelatin mixture and blend the mixture well.
Transfer it to a bowl and stir in the yogurt.
Beat the cream in a chilled until it forms stiff peaks.
Fold it into the cherry mixture gently but thoroughly and either divide the mousse among 4 dessert glasses or put into a big glass bowl.
Chill the mousse for at least 4 hours or overnight.
Garnish with the drained sour cherry preserve.