Expect these seats to be filled soon.Photo courtesy the Grand TierAs you might expect from a high-class operation like Grub Street, we’re frequently out at the opera, taking in Roméo et Juliette, and getting hungry during the second act. Naturally, our thoughts drift toward the Grand Tier, the tall restaurant in Lincoln Center whose vast Chagall murals overlook the fountain. It’s been closed for a while, but the place is now reopening under chef Michael Burbella, an alum of Gramercy Tavern and Gotham Bar and Grill. The score Burbella will be arranging has a tonic note of modern Mediterranean cooking, with a leitmotif of autumn flavors. The place, formerly open just to operagoers, is now open to anyone with tickets to Avery Fisher Hall or the New York State Theater.