Place the fruit in a saucepan with the caster sugar and heat, stirring, for 3–4 minutes until the fruit has softened and defrosted. Tip the fruit and juice into a flameproof dish.
Mix together the rice pudding and yogurt in a bowl, then spoon over the fruit. Sprinkle over the brown sugar and place under a preheated hot grill for about 2 minutes until the sugar starts to melt and caramelize. Cool slightly before serving.