Latte Express, on Kearny and Sacramento. Unlikely location, fantastic grilled pork banh mi assembled to order. Crispy bun, loads of carrots and cilantro, just enough mayo to keep everything moist. De-ribbed and de-seeded jalapenos. Tasty, lean barbecued pork.
Banh mi are delicious, cheap Vietnamese sandwiches that are found in abundance in the Tenderloin but are rare or pre-made elsewhere.