Preheat oven to 375 degrees.
Add all apple filling ingredients in a large bowl and stir with a wooden spoon to combine.
Transfer apple filling to a 10-inch cast iron skillet.
To make the topping, place flour, oats, brown sugar, spices, salt and pecans in a food processor. Pulse until nuts are chopped.
Add cubed butter to food processor and pulse until mixture resembles wet sand.
Using your fingers, sprinkle crumble mixture over apple filling until evenly covered.
Bake for 30 minutes or until topping is browned and apple juices are bubbling.
Cool slightly on a wire rack before serving. Serve plain or top with vanilla bean ice cream and/or salted caramel sauce.
Cover and store leftovers in the refrigerator for up to 3 days.