3 large egg whites 175g caster sugar 1 level tsp cornflour 1 tsp malt vinegar 1 tsp vanilla extract icing sugar, to dust 200g fat-free Greek yogurt 1 large ripe mango, peeled, stoned and diced 4 passion fruits, pulp only icing sugar (optional) and a few physalis, to decorate raspberry sauce, to serve (see 'Try' below) Want to see what this recipe costs at different supermarkets?