Chef Daniel Boulud may hail from landlocked Lyon, France, but his Boulud Sud restaurant is a culinary journey through the Mediterranean, featuring cuisine from such locales as Sardinia, Greece, Tunisia, and Beirut. This spring, the acclaimed Manhattan eatery will debut a series of monthly dinners showcasing the authentic flavors of the region’s most delicious destinations. Created by Boulud Sud’s executive chef Travis Swikard, the Voyage Dinner Series will commence on April 7 with the four-course Evening in Is…