Mix the grapes (halve if necessary) with 2 tablespoons of powdered sugar, 1/2 teaspoon of finely grated orange peel and 4 tablespoons of orange juice and let it steep for 15 minutes. Roast the almond sticks in a pan without fat and leave to cool on a plate. Mix the mascarpone, vanilla yoghurt, 3 tablespoons orange juice and 20 g powdered sugar. Distribute in bowls. Spread the grapes on the crème and serve sprinkled with the almond sticks.