I had a torta al pastor from El Tonayense today and have to say, it's a great sandwich and at $5 bucks, very reasonable. Last year I thought it was one of the better sandwiches I've had and this reconfirmed things today.
The al pastor is nicely seasoned, dry (as opposed to runny), grilled onions peppers, beans (optional) and topped with salsa and lettuce and tomato if you want it. They use a nice (Francisican?) french roll that's toasted and crusty. The tortas vary slightly from the truck at Best Buy and 19th and Harrison but both are great.
Any rec's on other tortas in SF or the East Bay? These seem to be a little harder to find then tacos.