I found Tartine just before noon on a Wednesday morning; like so many popular places in SF, it eschews notable signage, displaying a plain black sign with no lettering over tall windows. It was by chance I found it (well, chance and a nearby bus stop, en route to yet another apartment viewing) but I'm very glad I did.
Though the pastries were tempting, reminding me a little of the jewel-toned and rich chocolate desserts I first became acquainted with at Edmonton's Duchess Bake Shop, I snapped up a slice of the ham and cheese quiche, and was very happy with my choice. The quiche was delicious. Balanced, texture and flavour-wise, the ham added a salty undertone that fit, but which didn't overwhelm the other flavours. When I make quiche at home, it's often too soft (my baking curse continues!) but Tartine's doesn't suffer a similar fate. It's fluffy but not inconsequential, and made for a tasty, light lunch as I sat outside at one of their patio tables and watched the world slip past Guerrero and 18th.
Even mid-week, there were lines to contend with, but the staff were friendly and helpful, and the line moved pretty quickly. I'll be happy to return, and maybe indulge my sweet tooth the next time around!