Greek Yogurt Mousse with Stone Fruit

Name: Greek Yogurt Mousse with Stone Fruit
Ingredients: 225 grams egg yolks; 375 grams sugar; 3 vanilla beans, split and scraped; 1000 grams heavy cream; 10 sheets gelatin silver, bloomed in ice water; 1500 grams Greek yogurt; Stone Fruit, recipe follows; 2 cups sugar; 1 cup Aperol; 1 cup Campari; Pinch saffron; 1 bunch fresh basil 1 vanilla bean, split and scraped; 3 peaches, cut into large chunks; 3 plums, cut into large chunks; 1 grapefruit, supreme (peel cut away and segments cut free from the skins)