In a large pot, bring salted water to a boil. Add the linguine or spaghetti and cook according to the package instructions until al dente. Remember to reserve 1 cup of the pasta cooking water before draining. Once done, drain the pasta and set it aside.
In a spacious skillet over medium heat, melt 2 tablespoons of the butter. Add the minced garlic and red pepper flakes, sautéing for about 1 minute until the garlic is fragrant. Keep a close eye to avoid burning the garlic.
Add the shrimp to the skillet in a single layer. Cook for 2-3 minutes, stirring frequently until the shrimp turn a beautiful pink color and are cooked through. Season generously with salt and freshly ground black pepper.
Pour in the chicken broth along with the freshly squeezed lemon juice and zest. Allow the mixture to come to a gentle simmer and let it cook for another 2-3 minutes, allowing it to reduce slightly and develop flavor.
Directly add the drained pasta to the skillet. Toss everything together to ensure the pasta is well coated with the sauce. If the dish appears dry, incorporate the reserved pasta water a little at a time until you reach the desired consistency.
Remove the skillet from the heat and stir in the remaining 2 tablespoons of butter and the chopped parsley. Mix well until the butter is fully melted and the ingredients are integrated.
Plate the shrimp scampi while hot. Feel free to garnish with additional fresh parsley and a sprinkle of grated Parmesan cheese, if using.
Notes
For an elegant touch, serve in warmed bowls with fresh parsley and lemon.