I'm going to say right off bat that I'm completely okay with white potatoes... As long as that glucose is being used in the body and not just being packed away into fat cells. That being said, there are times when I do not need the extra simple sugars from white potatoes and green plantains would be more beneficial for me.
Now don't get me wrong... I'm perfectly fine with some REAL mashed potatoes every now and then, but sometimes you just don't want (or need) the extra simple carbs. That's the perfect time to substitute those mashed potatoes with cauli-potatoes (aka cauliflower mashed potatoes)! They are still creamy, tasty, and goes great with any dish! (and yes, they taste better than they look...(:)