4 apples, peeled and cut into thin slices
2 tsp sugar
1 tsp ground cinnamon
1/3 cup brown sugar
1 cup rolled oats
2 tbsp butter, unsalted
4 scoops vanilla ice cream (optional)
Preheat the oven to 400F. Butter an oven-safe dish.
Peel the apples, remove and discard the cores, cut them into thin slices. Arrange the slices in the buttered dish, then sprinkle with the sugar and cinnamon. Bake in the middle of the oven 12-15 minutes.
During this time, combine the brown sugar, rolled oats, and butter in a bowl. Using a pastry blender or 2 knives, blend the ingredients until a crumbly pastry mixture forms (about the size of peas).
Take the dish out of the oven, spread the crumbly mixture evenly over the apples. Bake an additional 15 minutes, until the topping is golden-brown.
Let stand 15 minutes, then serve with vanilla ice cream, if desired.