Mystic, ct area
The Boathouse(used to be Jamms) - good casual food
The Oyster bar is excellent and higher priced
Peking- Tokyo - sushi
Thai- one on and Rice, Spice Noodle are good
If you want Vietnamese- Theres a new place in Groton called Phantasia in the Big Y shopping center that has excellent Pho and a few other vietnamese dishes i have yet to try.