I also had another superb meal at Mason's on sunday. They are doing some wonderful things with tomatoes there right now and you should go if you can. My favorite things were an amazing cold golden tomato soup with dungeness crap (a lot) and avocado. Another delicious dish is the salmon tartare.
This link comes from Guphy, it's a cap radio piece on a local restaurant being revitalized right out of business. So that makes at least two, this place and Earl of Sandwich, that have been driven out of business by rising rents. I wonder what's going on with Joe Sun right now.