I have just finished making my Christmas Apple Crumble and remembered a wee trick I use. I like my crumble to have some mushy apple-y bits and to have some more 'bite-y' apple bits. I could never manage to get both until I had a light bulb moment - I cut a third of the apple very thin (mush!) a third medium slice (btw mush and bite) and a third thick sliced (bite!). It works really well. I also sprinkled some cinnamon powder into the crumble mix - mmmmm - and christmassy smells!