Bring a large pot of salted water to a boil. Add spaghetti and cook according to package instructions until al dente.

Reserve 1 cup of pasta water, then drain the pasta in a colander.

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

Stir in lemon juice, lemon zest, red pepper flakes, salt, and black pepper. Cook for another minute.

Add the drained pasta to the skillet with the sauce. Toss to combine, adding reserved pasta water as needed to reach desired consistency.

Serve immediately, garnished with chopped parsley and grated parmesan cheese.