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 the skillet, and cook for 2-3 minutes per side until pink and opaque. Transfer shrimp to a plate and set aside.
03 - Reduce heat to medium. Add butter and remaining 1 tablespoon olive oil to the same skillet. Sauté minced garlic for 30 seconds until fragrant, being careful not to burn it.
04 - Pour in heavy cream and bring to a gentle simmer. Add Parmesan cheese, black pepper, salt, and nutmeg if using. Cook for 2-3 minutes, stirring constantly, until the sauce thickens slightly and the cheese is fully melted.
05 - Add drained fettuccine to the skillet and toss gently to coat evenly. If the sauce is too thick, gradually add reserved pasta water, a tablespoon at a time, until you achieve the desired consistency.
06 - Return cooked shrimp to the pan and toss to combine. Stir in chopped parsley. Serve immediately, garnished with additional fresh parsley and lemon wedges if desired.