We love these while camping. They are super easy to prepare, wrap in foil and place on the grill over the campfire. I especially like how they can be personalized by adding or omitting the raisins and nuts.
Coring the apples wasn't working for me, so I sliced the apples. I cooked them (wrapped in foil) in a 400ºF oven for about 30 minutes until nice and tender. The skin on my apples was rather tough (no fault of the recipe), so next time I'll peel the apples. Served these with French vanilla ice cream on the top -- yum!
This tastes kind of like apple pie without the crust. We cooked ours on the grill and they needed a longer cooking time than 20 minutes for the apples to get tender.