I've seen too late that someone else has already done an apple recipe, but this is slightly different so I post it anyway

That's something I used to get at my grandma's in winter. We always did the simple version, just placing a washed apple on top of her coal stove. My mom never let me do it at home because it made a mess on the stove *lol*

This is a refined, more civilized variant.
If you cook it for adults, you can add a few drops of rum to the fillings.