01 - Cook the linguine or spaghetti in a large pot of salted boiling water according to package directions until al dente. Before draining, reserve 1/2 cup of the pasta cooking water. Drain the pasta and set aside.
02 - While the pasta cooks, gently pat the peeled and deveined shrimp dry with paper towels. Season the shrimp lightly with salt and freshly ground black pepper.
03 - In a large skillet, heat the olive oil over medium-high heat. Arrange the seasoned shrimp in a single layer in the hot skillet. Cook for approximately 2 minutes per side, just until they turn pink and opaque. Transfer the cooked shrimp to a clean plate.
04 - Reduce the heat to medium. In the same skillet, add the unsalted butter and minced garlic. Sauté for about 1 minute, stirring constantly, until the garlic becomes fragrant. Be careful not to brown or burn the garlic.
05 - Stir in the crushed red pepper flakes (if using), lemon zest, and fresh lemon juice into the skillet. Mix well, using a spatula or wooden spoon to scrape up any browned bits from the bottom of the pan.
06 - Return the seared shrimp to the skillet with the lemon-garlic butter sauce. Add the finely chopped fresh parsley. Toss everything together gently to ensure the shrimp is thoroughly coated.
07 - Add the drained pasta and a splash of the reserved pasta cooking water to the skillet. Toss continuously until the pasta is well coated with the sauce and heated through. Taste and adjust the seasoning with additional salt and pepper if needed.
08 - Serve the Lemon Garlic Shrimp Scampi immediately. Garnish with extra chopped parsley and fresh lemon wedges, if desired, for an appealing presentation.