Preheat oven to 400°F. Cut squash into cubes, toss with melted oil and place on a silicone or parchment lined baking sheet. Bake for 30-40 minutes or until squash is soft and golden on some edges. Reduce oven temperature to 375°F.
Place the squash, coconut milk, fish sauce and Chinese Five Spice in a pot and blend with stick blender until completely smooth. Set aside.
Lay chicken breasts on parchment or silicone lined tray, season with salt and pepper, if desired, and bake for 25 minutes.
Bring a large pot of water to a boil, place noodles in and remove from heat. Let stand 8-10 minutes or until soft. Drain.
Slice chicken breasts into small pieces, toss noodles with sauce, place in bowl and serve chicken on top.