Prepare the apple filling

• Chop the apple into small pieces and place in a bowl.
• Add the lemon juice, cinnamon, raw sugar and melted butter.
• Mix until the apple is evenly coated.

Make the crumble topping

• Combine the flour, cinnamon, sugar and melted butter in a bowl.
• Rub the mixture gently by hand until crumbles form.

Assemble and bake

• Sprinkle the crumble topping over the apple mixture in a small baking dish.
• Bake at 175 °C for 25–30 min until golden and bubbling.