Peel the roasted sweet potatoes and mash up with the coconut oil, milk, cinnamon and salt. Some sweet potatoes are drier than others (e.g. purple sweet potatoes), so add more milk and coconut to get a similar consistency to hummus.
Place sweet potato mixture in baking dish, alternating colors if using multiple types of sweet potato.
Top evenly with crumble topping.
Bake at 350 for 45 minutes or until the topping is golden.