I have to recommend the restaurant I just went to for dinner with my family. We went to Luso in Smithtown, it's a Portuguese wood grill, opened maybe 6 or so months ago? It was SO GOOD. The meats are juicy, tender, and flavorful, and you get a boatload of sides served family style...salad, potato chips, french fries, boiled potatoes with steamed broccoli and carrots, rice pilaf, and because we got some specials, we also got a cute little kettle of black beans and collard greens. It's a tad pricey, but for the amount of food you get it's well worth it.
I highly recommend it to anyone that's in the area, or even if you're willing to travel a bit, it was so different for us and just delicious!