Rhubarb Strawberry Coffee Cake

Ingredients

• 5½oz / 160g / 1 cup all-purpose or plain flour
• 8oz / 225g / 1 cup granulated sugar
• 6oz / 175g / ¾ cup unsalted butter, softened
• 16oz / 450g / 3 cups rhubarb, cut into 1in/2.5cm dice
• 16oz / 450g / 3 cups fresh strawberries, roughly chopped
• 4fl oz / 120ml / ½ cup water or orange juice
• 4 tbsp cornflour
• 16oz / 450g / 3 cups all-purpose or plain flour
• 8oz / 225g / 1 cup, packed granulated sugar
• 1 tsp baking powder
• 1 tsp bicarbonate of soda
• 1 tsp kosher salt
• 8oz / 225g / 1 cup cold unsalted butter, diced
• 8fl oz / 240ml / 1 cup buttermilk
• 2 large eggs