Soak the gelatine. Heat up grape juice, 3 tbsp. lemon juice and 50 g sugar. Squeeze the gelatine and dissolve in it. Leave to stand for 30-45 minutes until a trace is formed as it is pulled through. Wash and pluck the grapes
Stir the jelly again until slightly smooth. Fold in grapes. Pour everything into 10-12 dessert glasses or a large bowl. Chill for at least 5 hours (preferably overnight)
Bring 800 ml wine, 200 g sugar and 4 tablespoons lemon juice to the boil. Mix sauce powder and 200 ml wine, stir into the boiling wine. Simmer for about 1 minute while stirring. Cool down, stir more often
Whip the cream until stiff, fold into the sauce in portions. Spread on the jelly