Tortas Wash Mobile, established in 1964, is named for its location in front of a now-defunct carwash. Tijuana's first torta cart only makes one thing - the perfect carne asada torta. The meat is marinated and slow-cooked over a mix of mesquite and charcoal for twelve hours. The tender meat is then placed in a pan of beef stock as the sandwich is prepared. The bottom of a toasted Mexico City style bolillo is dipped in the stock, smeared with a thin layer of mayo, then stuffed with heaps of succulent beef. The sandwich is finished with guacamole, tomatoes, pickled red onions and a spicy red salsa, if desired.