I love apple crumble too! But I don't follow a recipe, I just chuck everything in.

Firstly rub some butter (about 1 tbsp) into plain flour (about 1/4 cup?) until it resembles bread crumbs. Then mix in handfuls of rolled oats, coconut and brown sugar. Add a little cinnamon.

Slice apple thinly - I prefer Granny Smith. Then in a baking dish layer the apple and crumble mix alternatively. Put a little water in the bottom (1-2 tbsp) and bake until golden and apples cooked.

We eat it with ice-cream or custard!

For some variety you could also add some berries or some sultanas.