Rhubarb buckle - Good Food Middle East

Ingredients

• 50g plain flour
• 50g golden caster sugar
• ½ tsp ground ginger
• 50g unsalted butter, chilled
• 25g rolled oat
• 225g thin, forced rhubarb, trimmed, rinsed and cut into 2½ cm/1in-long pieces
• zest 1 orange
• 100g unsalted butter, room temperature, plus extra for greasing
• 200g golden caster sugar
• 2 large egg
• 200g plain flour
• 2 tsp baking powder
• 1 tsp vanilla bean paste
• 125ml soured cream