There are only two reasons that I go to the Potbelly Sandwich Shop on McDowell. First, it's close enough to my office to give me a brisk walk at lunchtime. Second, it's to order a tuna sandwich. Let me explain. I have never ever been a fan of something called a tuna melt - melted cheese over warm tunafish. Who does that? But - at Potbelly, they toast the bread (wholegrain) and put the tuna on to heat it up. I order without the cheese and then, beg for a heaping amount of their proprietary hot pepper giardiniera! It's amazing. Bon Appetit magazine called it the most underrated condiment of all time. They are right. And, they sell it by the jar!!