- Pre-heat oven to 190°C/375°F/Gas Mark 5. Place the cookie and pastry mixes into a bowl fitted with whisk beaters. Add the water and mix on slow speed until a dough is formed.
- Roll the dough out and press into a lightly greased tin 25cm x 20cm (10" x 8"). Top with apple slices.
- Sprinkle with crumble mix and bake for abour 25-30 minutes until golden brown.