Thanks everyone.

I live in Boston, so my best chance at getting the delicata would be at Whole Foods I think. Butternut is readily available here though. But the 7 net carbs of the delicata is appealing.

I am trying to modify this recipe and really wanted the texture of the potato:
African Peanut Chicken stew
http://simplyrecipes.com/recipes/af...en_peanut_stew/