Two words: Adobada Torta. If you have not tried Phat Phranks, it is imperative that you do so ASAP! The chile verde burrito is also wonderful - a little spice, and lots of flavor! The fish tacos are to die for, and if you like authentic Mexican So-Cal style, this is the place to go.
Besides having a small-town Restaraunt atmosphere in a big city, Frank seriously makes every guest feel welcome. If it isn't right, he will make it right immediately. It's always refreshing to see the owner working behind the counter, ensuring everything is just right for his guests.