Sub sandwiches are what they do at the Yellow Submarine. There's a pleasant, older Arabian woman who's worked there over 30 years. I visited this place years ago and had forgotten its name, but I still remember how good it was.
I like the beef-and-bell-pepper sandwich, but their marinated chicken sandwich is also very tasty. The woman wouldn't say what they use to marinate the chicken, but she smiled and told me I would like it. They must be doing something right to be here this long.
If you want a really good, tasty Philly cheesesteak sandwich, give this place a try.
This is close walking distance to the UCSF campus, so it may get a bit of traffic from the students and staff.
Muni lines 43, N.