On the water between Fort Pond Bay and Tuthill Pond, this is the kind of simple place people try to keep to themselves — like Ina Garten. You order your lobster roll, fish and chips, steamed clams, mussels, or other light fare at a window, pick up a buzzer, collect your food when it sounds, and choose your table. There’s an excellent sunset view, too. Takeout available. B.Y.O.B.