Adapted from Saveur.com
4. Grease a deep 9″ x 13″ baking dish with olive oil. Place half the pasta mixture on bottom of dish and cover evenly with meat sauce. Top with remaining pasta mixture. Pour béchamel over pasta, spreading it evenly with a rubber spatula. Bake until the top is golden brown, about 1 hour. Transfer to wire rack; cool 20 minutes before serving.