To prepare the oatmeal crumble, preheat the oven to 350 degrees.
Add the oats, pecans, flour, brown sugar, salt, cinnamon, and nutmeg to a large bowl. Pour the butter over the mixture and stir until well combined.
Spread the mixture onto a baking sheet and bake for 10 minutes.
Allow to cool before using.
To make the apples, peel and dice the apples into bite sized pieces.
Add the apples, butter, brown sugar, and cinnamon to a medium skillet and cook, stirring often to coat the apples in the sauce, for 5 minutes over medium low heat.
Remove from heat and cool a bit before assembling the dessert.
Add a generous layer of oatmeal crumble to the bottom of each dish (2-3 tablespoons) and top with the cinnamon apples.
Top with a layer of whipped cream, ice cream, or vanilla yogurt. Sprinkle on a bit more of the crumble and drizzle any of the remaining caramel sauce from the pan of apples over the top.