Rustic Nectarine, Peach and Apricot Tart

Crust

• 1 1/2 cups (225 g) unbleached all-purpose flour
• 3 tbsp icing sugar
• 1 tsp baking powder
• 1/4 tsp salt
• 1/4 cup (115 g) unsalted butter, cold, diced
• 1/4 cup (60 ml) plain yogurt
• 1 tbsp (15 ml) ice water
• Milk, for brushing
• Sugar, for sprinkling

Fruit

• 6 cups (1 kg) fruit cut into fine wedges (such as nectarines, peaches, apricots)
• 1/2 cup (105 g) sugar
• 1 tsp cornstarch