Preheat oven to 180°C. Place the tart cases on a baking tray. Bake in oven for 10 minutes or until golden brown.
Meanwhile, combine the plain flour and butter in a small bowl. Add the almonds and sugar and stir to combine.
Spoon the fruit mince among the tart cases. Top with the almond mixture. Bake for 10 minutes or until the crumble is golden. Dust with icing sugar to serve.