Potatoes are very good for you but they have gottten a bad rap in the diet field because of the stuff that tends to wind up on top of them!
Try these low fat potato toppings.
plain yogurt instead of sour cream (once you get used to it, you'll never go back to sour cream)
chopped chives
chopped dill, dried dill
chopped parsley, dried parsley
salsa
stewed tomatoes
soy sauce
sesame oil