O2 Valley

Taiwanese fusion cuisine featuring bentos, grilled appetizers, and boba drinks.

O2 Valley makes Taiwanese bento and tea an easy combination in downtown San Mateo. Fried pork chop, grilled chicken cutlet, popcorn chicken, pork belly, and Taiwanese sausage offer several starting points for a bento meal. We like the variety of preparations, from braised and grilled options to the crunchier fried choices. The menu extends into snacks such as basil popcorn chicken, turnip cake, crispy tofu, and sesame balls, making it possible to order a full meal or share a few smaller dishes. Drinks range from classic and jasmine milk teas to winter melon tea, lemon ai-yu, and fruit sodas with jelly or popping boba. Party trays bring the same foods into a group setting. O2 Valley's appeal is this combination of savory Taiwanese comfort food and a broad drink selection, with plenty of ways to pair a bento or snack with something refreshing.