San Tung Chinese Restaurant in the Inner Sunset.
Order the Dry Fried Chicken Traditional (like in the picture). It is phenomenally good. It is one of the best chicken dishes I've ever had. EVER.
If it's cold, bring a coat because there's always a line to get in and they don't take reservations. A 45-minute wait on weekends is normal. We went tonight at 6:00 and waited twenty minutes (not so bad, we watched the sunset).
Well worth the wait!