Step 1

Preheat the oven to 180°C (160 fan/ 350F/ gas 4).

Step 2

Peel, core and slice the apples and place in a large pie dish (about 2 litres capacity).

Step 3

Mix in the blueberries, caster sugar, cinnamon and 1 tablespoon of flour.

Step 4

In a mixing bowl place the plain flour, oats, and brown sugar and pour in the melted butter. Mix until a crumble topping forms.

Step 5

Spoon the crumble topping over the fruit and bake in the oven for 45-50 minutes until the fruit is bubbling and the crumble topping is golden.