"Sunday’s Snacks & Convenience is the epitome of grab-and-go food culture. For a stupendously expensive city like San Francisco, every chicken katsu sandwich and breakfast musubi is priced affordably. There’s something for everyone—the house-cured bacon, egg, konbu, shiitake, and rice musabi is $3. In line with so many new businesses in San Francisco, Sunday’s is currently a weekend pop-up within Boba Guys Fillmore. We say currently as dozens of these newly-minted entrepreneurs are running with the wild success of their pop-ups and opening brick-and-mortars around the city. (The next pop-up location kicks off in June at the Asian Art Museum.) In the interim, we’ll be at Boba Guys on Saturdays to pick up our soy-braised pork belly sando on soft, pillowy milk bread. "