1. Cook pasta in boiling salted water according to package directions; drain.
2. Heat 1 tablespoon oil in a large nonstick skillet over medium-high heat. Add half of shrimp, and cook 1 minute on each side or until opaque. Transfer shrimp to a plate, cover, and keep warm. Repeat with 1 tablespoon oil and remaining shrimp.
3. Melt butter over medium heat in same skillet. Add remaining 1 tablespoon oil, garlic, and red pepper; sauté 3 minutes or until garlic starts to brown. Stir in cooked shrimp, parsley, lemon zest and juice, and salt; cook 1 minute. Add pasta, and cook 1 minute or until hot, tossing constantly. Serve immediately.