I think its fair to say that every household in Gibraltar has a recipe for Apple crumble or some sort of other fruit crumble. It must have been one of the easiest desserts to make, plus because seasonal fruit was used, it would have been a very economic recipe to help stretch the weekly wages feed the family . I remember my grandmother would usually make apple and peach cobblers which would be served with either shop bought custard instead of her home made one, or tinned cream, depending on the occasion.
Its very usual nowadays to add oats to the crumble as we are all that little more health conscience, and if this is how you feel then you can always substitute half the flour in the crumble base with oats although these need to be the rolled oat variety.
I had some Apples lying around so I made this very delicious and simple recipe. It brought back a lot of fond memories, which I think good food should always do.