Classic Shrimp Fettuccine Alfredo | Recipe Saver

Ingredients

• 1 (16-ounce) package fettuccine
• 1/2 cup butter, cubed
• 3 medium onions, halved, thinly sliced
• 8 cloves garlic, minced
• 4 teaspoons all-purpose flour
• 1 teaspoon salt
• 1 teaspoon pepper
• 1 cup half-and-half
• 2 pounds shrimp, peeled and deveined
• 1 tablespoon lemon zest, plus 2 tablespoons lemon juice
• 1 cup parmesan cheese, grated
• 2 tablespoons fresh parsley, minced