INGREDIENTS: Soak ½ cup (100 g) sugar Pinch of kosher salt 1 vanilla bean, halved lengthwise ½ cup (100 g) silver tequila Filling 1 envelope unflavored powdered gelatin (about 2½ tsp.) 1 (heaping) cup (200 g) fresh mango pieces (from 1 large ripe mango), puréed …