Cook tortellini according to package directions. Drain. Meanwhile, place the beans and milk in a food processor bowl or blender container. Cover and process till smooth. Transfer to a large skillet. Stir in grated Parmesan cheese, pepper, oregano, salt, nutmeg and pepper. Cook and Stir till heated through. Serve sauce over drained tortellini. If desired, sprinkle with shredded Parmesan cheese and garnish with fresh oregano.