I am running an errand from Dulles to Baltimore and back this evening with a colleague, and we would like to get an inexpensive dinner while there without going much out of our way from I-95. He is Moslem, so no pork. I prefer anything delicious and cheap. So, what's good, and easy to find? I do have Google maps on my phone so if deliciousness requires we can stray from the highway but I would rather keep it simple, directionswise. We expect to get to Baltimore around six, and hope to eat soon afterward.