- STEP 1
Preheat oven to gas 6, 200C. Line and grease a 30x20cm tin. Rub the butter into the flour to form breadcrumbs then add the baking powder and sugar.
- STEP 2
Add a pinch of salt to the lemon zest then add it to the flour mixture along with the egg. Tip half of this mixture into the prepared tin and press down firmly with the back of a spoon to form a base.
- STEP 3
Stir in the oats and coconut to the remaining mixture.
- STEP 4
Add the demerara sugar to the plums and add the cornflour, vanilla and lemon juice.
- STEP 5
Spread this mixture evenly over the base then top with the remaining crumble.
- STEP 6
Bake for 50-55 mins until the top is golden. Remove from the oven and leave to cool. Cut into squares once cold.