Potato Rolls

Last night my mom made potato rolls for dinner and they were delicious. While we were eating them, I asked why she made them and she said, "Because we had some leftover mashed potatoes and it makes the rolls light and fluffy."

I replied, "I thought the potatoes make the rolls thick and heavy."

And my dad said, "I thought the potatoes are added for flavor."

So why are potatoes added to potato rolls? I guess we'll never know. They sure were good though.