Arizmendi is a great place to go for a slice of pizza. They have creative toppings - only one type per day - and the dough is so, so good. It's a great spot for a quick, cheap lunch.
Or pick up a Chocolate Thing - there's nothing like it anywhere - and a cup of really well-brewed coffee, and sit on the outside bench or walk into GG Park for a nice breakfast.
The breads and rolls and all are super good, too. You really can't go wrong. And this is a worker-owned cooperative. That's nice, too, right?