01 - Bring a large pot of salted water to a boil. Add fettuccine and cook according to package directions until al dente. Reserve 1/2 cup of the pasta cooking water before draining. Set pasta aside.
02 - Heat 1 tablespoon olive oil in a large skillet over medium-high heat. Season shrimp lightly with salt and pepper, add to skillet, and sauté for 2–3 minutes per side until pink and opaque. Remove shrimp and set aside.
03 - Reduce heat to medium and add butter and remaining 1 tablespoon olive oil to the same skillet. Add minced garlic and sauté for 30 seconds until fragrant, taking care not to burn.
04 - Pour in heavy cream and bring to a gentle simmer. Whisk in Parmesan cheese, black pepper, salt, and nutmeg if using. Simmer for 2–3 minutes, stirring constantly, until sauce thickens slightly.
05 - Add drained fettuccine to the saucepan, tossing gently to coat evenly. If sauce is too thick, add reserved pasta water a tablespoon at a time until desired consistency is achieved.
06 - Return cooked shrimp to the pan and toss to combine. Stir in chopped parsley. Serve immediately, garnished with additional parsley and lemon wedges if desired.