Some of Long Island’s better (and best) restaurants have one thing in common…they can be found on Routee 25a as it winds through St. James along the north shore of Long Island. Take a drive along Suffolk County’s "restaurant row" and you’ll come upon Mirabelle (which is widely regarded as one of L.I.’s top restaurants, Kitchen - A Bistro (a BYO championed by area chefs as their favorite spot to eat), Bella Vita City Grill (a highly-rated Italian-American), and Oscar’s of St. James, where Nena and I dined a little over a week ago. Top-to-bottom, it was one of the…