Start by making the Nectarine Gelato and the Mango & Passionfruit Sorbet the day before. For the gelato, in a small saucepan whisk together the egg yolks and sugar into a smooth paste. Gradually whisk in the cream and milk until fully incorporated.
Place the saucepan over a low-medium heat, stirring continuously for 8-10 minutes, until it thickens slightly.