I was strolling down Telegraph Ave. in Berkeley yesterday and passed The Toaster Oven, a new sandwich shop with a crushing mass of students inside. The decor and vibe reminded me of my favorite sandwich store ever (Potbelly's, in Chicago), so I had to try it out. The line was very long but, as advertised in the store, it moved quickly. I got a BBQ chicken sandwich with the works (if I recall correctly this included tomatos, lettuce, onions, pickles and - crucially - hot peppers). It was really good!
The store has a prime location, just next to the university. A woman who worked there said they opened on Monday, though a bit of googling reveals they have three preexisting locations in San Francisco. Highly recommended.