Cook noodles according to package directions, omitting salt and fat. Drain well. Pat noodles dry with paper towels; set aside.
Pat scallops dry with paper towels. Place cornmeal in a shallow dish; dredge scallops in cornmeal. Heat 1 tablespoon peanut oil in a large nonstick skillet over medium-high heat. Add scallops; cook 3 minutes on each side or until browned. Remove from pan; cover and keep warm.
Heat remaining 2 tablespoons peanut oil in pan over medium-high heat. Add noodles; pat into an even layer in pan. Cook 3 minutes or until browned, shaking pan occasionally. Carefully turn the noodles over in sections; cook 3 minutes or until browned, shaking pan occasionally. Place browned noodles on a platter.
Heat sesame oil in pan over medium-high heat. Add green onions, ginger, and garlic; stir-fry 2 minutes. Stir in soy sauce, vinegar, and oyster sauce; cook 1 minute or until thoroughly heated. Drizzle sauce over noodles; top with scallops. Sprinkle with sesame seeds.