I just had the most delicious Thai dish for dinner at the Lemon Tree Cafe in Bedford (168 Great Road, Bedford Shopping Center, across the parking lot from the Whole Foods; take exit 31b from 95 and go west). It was called "Lady Salmon": a large fillet of salmon, with a crispy crust, slathered in modestly spicy curry sauce, bay leaves, thin lemon slices (a great shocking contrast--you are probably not supposed to eat them, but I did), eggplant and rice. So delicious, I went back and ordered it again a few days later. Huge portion too. But not on the lunch menu.
This place was recommended to me for sushi by a Japanese colleague (apparently they also own restaurants in Lexington and Burlington, but he thought the Lexington one wasn't as good). Anyway, I've been there several times for lunch and dinner. Their sushi is surprisingly good, in fact I would call it significantly better than average, although the nigiri is on the small side. Not something you would daydream about, but unlike most Boston sushi places I didn't leave saying "well it was OK, but they did this wrong, and that...." However, it is not really sushi I would go out of my way for (the only reason I've been there so much is because I work nearby).
I should mention that apparently the sushi chef broke his arm last week, so they are not serving sushi until a sub comes in next week.
On the Thai side of the menu, I've only had the above-mentioned, amazing Lady Salmon, and a much less inspired lunchtime salmon dish. My companions at lunch and dinner have usually ordered Thai dishes, and while they look OK, they didn't seem to be anything exciting. But, oh, that Lady Salmon...