Gluten-free Apple and Blackberry Crumble

In this wintry weather, it's comforting to have a hot pudding, but not always easy when you have to avoid gluten.
This Apple and Blackberry Crumble is simple to make and can be enjoyed by everyone.

Turn on your over to Gas Mark 6 or 200ºC
You will need:
8oz Doves Farm Gluten Free Plain White Flour
4oz Caster Sugar
4oz Margarine or Butter
2tbsp Sugar to sweeten apples
1tbsp Demerara Sugar to sprinkle on top of crumble
3-4 Cooking Apples
Handful blackberries
(For Metric measurements - see my chart above)

Using a food processor or simply your fingers, rub the margarine into the flour until it is like breadcrumbs.
Add the sugar and stir in.
That's it!
Peel, core and cut the apple into quarters and then slice them up.
Mix in the blackberries and sugar.
Place in an oven proof dish, big enough to take the fruit and the crumble.
Spread the crumble on top, pressing it down gently with the back of a wooden spoon.
Sprinkle the Demerara on the top.
Place dish on a baking tray to keep your oven clean.
Cook for about 40 minutes.
It's delicious with vanilla ice cream or custard. (Recipe can be found here with the instructions for my Gluten-free Blueberry Sponge Pudding.)
You can also ring the changes with plain apple, apple and blueberry, apple and cinnamon, or rhubarb which is delicious with added orange zest and ginger.
That should keep you warm until the spring!