The Friday File: America’s most popular sandwich is grilled cheese, with 79% of respondents liking or somewhat liking it. Next, in a fowl tie is the turkey sandwich and the grilled chicken sandwich at 75%. Roast beef follows at 71% then comes the pork parade with both the ham sandwich and BLT at 69%, club at 68% and the bacon sandwich at 67%. My favorite, the PB&J follows at 66%.