Check out the R&R Deli inside the Shell station at U.S. 1 and Rte 174 in Elkridge.
Great takeout tacos with a range from barbacoa to carne asada to carnitas and on. They also make fruit shakes -- just milk and fresh fruit and they cut up when you place your order. Nine bucks buys you a spectacular lunch -- three tacos and a milkshake.
Seriously, R&R is inside the Shell station. They run a spotless open kitchen that is separated from the automotive section by a glass wall.