50 mins will be close, but you should be able to do it. Like TBS said, all of the AA gates are spitting distance from each other, and there is food fairly close to the AA gates. Airside 1, which is where the AA gates are located, doesn't have anything very fancy, or extremely good, but there is a Starbucks. Other notables are a Burger King and a Cinnabon.
If you can get a longer turnaround, there is a Chili's, Macaroni Grill, and a Fox Sports Bar in the Main Terminal, an Outback Steakhouse at Airside 4,