Blue-haired former “Hell’s Kitchen” contestant Jason Santos has built up quite the restaurant portfolio in the Hub over the last several years, yet he doesn’t seem content to rest on his laurels. Witness the recent debut of the Back Bay’s Buttermilk & Bourbon (160 Commonwealth Ave., 617-266-1122, buttermilkbourbon.com), a Southern-themed eatery boasting regional specialties like buttermilk fried chicken, honey-glazed biscuits and fresh-fried beignets (pictured). And that’s not all—the subterranean space also boasts a raw bar and plenty of Big Easy-inspired cocktails, including the signature B&B Hurricane (a melange of rum, fruit juices, simple syrup and grenadine) on tap.