Apple crumble (quick)

A quick recipe - I have literally made this while the guests sit down to dinner, put it in the oven and served when the meal was done.

1 large tin apples in the bottom of a square oven dish

Crumble: 100 g butter into 1 cup flour until it looks like breadcrumbs, add 0.5 cup brown sugar and 1 t cinnamon. Spread over apples and bake 30 minutes at 180 degrees.

Serve with ice-cream or custard.