Preheat your oven to 350°F and place six 6-ounce ramekins on a baking sheet.
Brush each ramekin with the 1 tablespoon of melted butter.
Make the apple mixture: In a large bowl, combine the apples, brown sugar, cinnamon, and nutmeg.
Divide the apple mixture evenly between the ramekins.
Make the topping: In a medium-sized bowl, mix the brown sugar, flour, oats, cinnamon, and the 6 tablespoons of melted butter using a fork or mixing spoon.
Pour the topping mixture over the apple mixture in each ramekin.
Bake for about 35 minutes, or until the top is lightly browned and the apples are soft.
Best served warm, with ice cream and caramel if you like.