Terra Luna--North Truro, Mass.
I love this place. Small, friendly, good beer list, art by local artists on the walls.
Lots of local (and often organic) vegetables. Their salad with organic greens has one of my all-time favorite dressing: soy-ginger-orange vinaigrette. Lovely fresh-tasting gazpacho. Excellent pastas (esp linguini with shrimp, fresh spinach, tomatoes, feta, black olives, capers), grilled fish and meats.
No fried seafood. None at all.
Call ahead: they accept reservations for big groups and can offer guidance about low-wait times. It can get very busy.