01 - Cook the pasta in a large pot of salted boiling water according to package instructions until al dente. Reserve 1/2 cup of pasta water, then drain and set aside.
02 - Pat the shrimp dry and season lightly with salt and pepper.
03 - In a large skillet, heat olive oil over medium-high heat. Add shrimp in a single layer and cook for 2 minutes per side until just pink and opaque. Remove shrimp to a plate.
04 - Reduce heat to medium. In the same skillet, add butter and minced garlic. Sauté for 1 minute until fragrant, being careful not to brown the garlic.
05 - Add red pepper flakes (if using), lemon zest, and lemon juice. Stir to combine, scraping up any browned bits from the pan.
06 - Return the cooked shrimp to the skillet along with chopped parsley. Toss well to coat.
07 - Add drained pasta and a splash of reserved pasta water to the skillet. Toss everything together until the pasta is coated and heated through. Adjust seasoning with salt and pepper if needed.
08 - Serve immediately, garnished with extra parsley and lemon wedges if desired.