3 gelato chocolate sauce Recipes

cioccolato scuro ( bitter chocolate) gelato, olive oil, for greasing, white chocolate gelato, bacio (chocolate hazelnut) gelato, caramelized hazelnuts, chopped, sugar cookies or warm chocolate sauce, for serving, special equipment : 1 10- by 3- by 3-inch metal terrine

milk, sugar, chopped fresh mint leaves, lemon peel (about 2 in., yellow part only ), vanilla bean (2 to 3 in.), slit open lengthwise, or 1 tsp vanilla, egg yolks, bittersweet or semisweet chocolate, finely chopped, whipping cream or half-and-half (light cream)