Addie, I cannot eat a baked potato. It spikes my blood sugar, and I love baked potatoes! If I have them at dinner, I can eat maybe 1 or 2 bites of it along with the rest of my meal without having a BS spike.
For some reason I never found out, my grandfather did not allow bread and potatoes to be served at the same meal. It had to be one or the other. It wasn't because of his knowledge of nutrition because this was back in the early 1900's when no one really knew much about nutrition. And it couldn't have been because of the cost, because bread and potatoes were both very cheap back then. My mother never knew the reason, but he continued that until he died.