Give me a loaf of Blackbird's sourdough (either the brown or white) and a bottle of good olive oil, and I am a happy man.
Their sandwiches are simple yet excellent -- and very filling for $6 a pop. Some of their sweet treats, like the hazelnut torte and canele, are standouts as well.
I would skip the challah and also the croissants (they look amazing but are only alright).