Start blending the mango with 1/4 cup of water on high until you have a thick sauce. Add more water as needed by the tablespoon to get the blender going. Pour the mango sauce evenly into glasses or bowls. Set in the fridge. Blend together the protein powder, banana, and milk. Stir in chia seeds. Stir constantly for 3-4 minutes then let stand for about 5 minutes to thicken. 

When the mango sauce has set, pour the chia mixture on top in even portions. Allow to set for at least 4 hours in the fridge or overnight. Be sure to cover if you are storing over 1 day. It lasts 4 days in the fridge, covered. Serve with chopped nuts. Makes 2 servings.