1. Combine 1 teaspoon lime rind and next 3 ingredients in a shallow dish; add scallops, and let stand 5 minutes, turning once.
2. While scallops marinate, cook pasta according to package directions, omitting salt and fat. Drain well. Set aside; keep warm.
3. Remove scallops from marinade, reserving marinade. Coat a large nonstick skillet with cooking spray; place over medium-high heat until hot. Add scallops; cook 1 minute on each side or until lightly browned. Remove scallops from skillet; set aside, and keep warm. Add marinade mixture to skillet, and cook 1 minute, stirring to scrape particles that cling to bottom of skillet.
4. Combine pasta and green onions in a large bowl. Add scallops and marinade mixture to pasta mixture; toss lightly. Sprinkle with remaining 1 teaspoon lime rind.