Combine all crumble ingredients together. Start with ¼ cup oil. If needed, add a little more oil as necessary to get a crumble consistency. If it's too oily, just add a little more ground almonds.
In a separate bowl, combine all apple mixture ingredients together.
In a baking pan or individual dishes, layer crumble, apples, and crumble (you'll need more crumble for individual desserts). Bake for 45 minutes.