Apple and Blackberry Crumble

Peel and cut your apples into bite size chunks.
Add the apples to a saucepan or Dutch oven and cook over a medium heat for about 10 minutes, until they start to soften.
Add a few splashes of water to prevent the apples from sticking to the pan and stir regularly.
Preheat your oven to 180 °C / 350°F.
Add the flour, oats, sugar and cinnamon to large mixing bowl.
Use a spoon to mix the ingredients together well.
Cut up your cold butter into cubes (keep it in the fridge up until this point if you can).
Add the cubes of butter to the flour mixture and use your fingers to rub the butter into the flour mixture to form the crumble.
Transfer the cooked apples into a Pyrex dish or pie dish.
Add the blackberries and then the crumble mixture on top of the apples.
Bake in the oven for approximately 40 minutes, until the topping is golden brown.