When I ask the question quick and simple I mean "a great recipe that I have all the ingredients for now without having to make a trip to the store". http://www.food52.com/recipes/6501_nutty_professors_apple_crumble_with_chantilly_cream Here is a great recipe.

Apple crumble is claimed by the English as their contribution to the world and here is a really, really easy recipe http://www.bbc.co.uk/food/recipes/applecrumble_2971

Here's one yummy recipe from food52:

http://www.food52.com/recipes/6501_nutty_professors_apple_crumble_with_chantilly_cream