Given his stints at No. 9 Park and Prezza, chef Matt O’Neil knows from high-end. For the Swampscott native’s first solo flight, however, he chose to appeal to the rest of us. At his casual American-Mediterranean outpost, there’s a juicy blue cheese–stuffed burger for the college kid, quality cuts of swordfish and steak for Mom and Dad, and $6 meal deals with dessert for tykes. Dining out a few times a week here is both an attractive and affordable proposition, making the pull of the Blue Ox strong indeed.