preheat oven to 200C

peel the apples and remove the seed core, preferably with and appleslicer so the apple is still "complete"/in a spiral.

mix sugar with cinnamon and butter and add half of the breadcrumbs to the mix.

stuff the apples with the stuff you just made.

put the rest of the breadcrumbs in a ovenproof glassthingy and arrange the apples on it.

if you have marcipan put a nob on top of each apple for a lovely treat

enjoy

put in oven till the apples are soft when poked with a fork. If the apples are placed in a muffin thingy they will melt more than if they are placed in one big container.