Cook the pasta: Bring a large pot of salted water to a boil and cook 8 ounces of pasta according to the package directions. Drain and set aside.
Cook the shrimp: In a large skillet, heat 1 tablespoon olive oil over medium-high heat. Add ½ pound of peeled and deveined shrimp. Cook until the shrimp turn pink and are cooked through, about 2–3 minutes per side. Remove the shrimp from the pan and set aside.
Sauté the garlic: In the same pan, add 6 minced garlic cloves. Cook for 2–3 minutes, stirring frequently, until the garlic is fragrant but not browned.
Deglaze with wine (or broth) and lemon: Pour in 1½ cups dry white wine (or broth - see note below) and ¼ cup lemon juice. Bring to a boil, then reduce the heat and simmer for about 10 minutes, or until the liquid has reduced by half.
Season the sauce: Stir in 1 teaspoon Italian seasoning, ½ teaspoon dried parsley, ¼ teaspoon salt, and ¼ teaspoon black pepper.
Add cream, cheese, and butter: Pour in 1 cup heavy cream and let it simmer for 5 minutes. Reduce heat to medium-low and stir in 1½ cups freshly grated Parmesan cheese and 2 tablespoons butter. Continue stirring until the cheese is melted and the sauce is smooth.
Combine shrimp and sauce: Return the cooked shrimp to the pan. Let everything simmer together for 5–10 minutes, allowing the flavors to meld.
Toss with pasta and serve: Add the cooked pasta to the sauce and gently toss to coat. Garnish with extra Parmesan cheese and parsley, if desired. Serve immediately.