Bring a large pot of salted water to a boil. Add pasta and cook according to package instructions until al dente, about 8-10 minutes. Reserve 1 cup of pasta water and drain the pasta.

In a large skillet, heat olive oil over medium heat. Add sliced garlic and sauté for 1-2 minutes until golden and fragrant.

Add red pepper flakes to the skillet and stir for 30 seconds to meld flavors.

Add the drained pasta to the skillet, tossing with the garlic oil. Gradually add reserved pasta water until desired sauce consistency is achieved.

Remove from heat and stir in parsley, lemon zest, and Parmesan cheese. Season with salt and pepper to taste.

Plate the pasta and sprinkle with additional Parmesan and parsley. Serve immediately.