Begin by cooking the linguine according to the package instructions until al dente. Drain and set aside, reserving about 1/2 cup of the pasta water.
In a large skillet, melt the butter over medium heat. Add the minced garlic and sauté for about 1 minute until fragrant, being careful not to burn it.
Stir in the shrimp, red pepper flakes, and season with salt and pepper. Cook the shrimp for about 2-3 minutes on each side until they turn pink and opaque.
Add the lemon zest and lemon juice to the skillet, stirring well to combine all the flavors. If the sauce seems too thick, add a splash of the reserved pasta water to reach your desired consistency.
Toss the cooked linguine into the skillet with the shrimp and sauce, ensuring that the pasta is fully coated. If necessary, add more reserved pasta water to help the sauce adhere.
Remove from heat, and stir in the chopped parsley for a fresh touch.
Serve immediately, garnished with additional parsley and grated Parmesan cheese if desired.
Notes
Adjust red pepper flakes to taste for desired spiciness.