Cook fettuccine to desired doneness as directed on package.
Meanwhile, spray large nonstick skillet with nonstick cooking spray. Add butter; melt over medium-high heat. Add garlic; cook until golden brown. Add milk and flour; mix with wire whisk until smooth. Cook and stir until mixture comes to a boil and thickens slightly.
Reduce heat to medium-low. Stir in cream cheese and Parmesan cheese; cook until mixture thickens and cream cheese melts. Stir in salmon and lemon peel.
Drain fettuccine. Add to cheese mixture; toss gently until well coated. Sprinkle with parsley.