In a large pot, bring salted water to a vigorous boil. Add the linguine or spaghetti and cook according to the package instructions, or until al dente. Once cooked, drain the pasta, reserving 1/2 cup of the pasta water for later use, and set the pasta aside.
In a large skillet heated over medium heat, add the unsalted butter. Allow it to melt fully, then introduce the minced garlic and red pepper flakes. Sauté the mixture for 1-2 minutes, stirring frequently, until the garlic is fragrant and lightly golden.
Carefully place the shrimp into the skillet in an even layer. Season generously with salt and freshly cracked black pepper. Cook the shrimp for about 2-3 minutes on one side until they begin to turn pink, then flip them over. Cook for an additional 2 minutes or until the shrimp are completely pink and opaque.
Once the shrimp are cooked, pour in the lemon zest and juice. Stir in the chopped parsley and halved cherry tomatoes, if using. If the sauce appears too thick, add the reserved pasta water gradually, stirring until you achieve your desired sauce consistency.
Add the drained pasta to the skillet with the shrimp and lemon sauce. Toss everything gently until the pasta is well coated with the sauce, allowing it to heat through for about 1 minute to let the flavors meld beautifully.
Distribute the shrimp scampi evenly onto plates, garnishing with a sprinkle of extra parsley and an additional dash of lemon zest for a bright finish. Serve immediately while hot.
Notes
Adjust the red pepper flakes based on your spice preference.