Cook Your Spaghetti: Boil pasta in salted water until al dente. Reserve ½ cup pasta water before draining.Infuse the Olive Oil: Heat olive oil over medium-low heat. Add sliced garlic and sauté until light golden. Add chili flakes and let sizzle for 30 seconds.Add Your Pasta: Toss cooked spaghetti in the garlic oil. Add pasta water to create a glossy sauce.Finish With Parsley & Parmesan: Turn off heat, stir in parsley, and sprinkle parmesan if desired. Adjust salt and seasoning to taste.Serve Immediately: Plate hot and enjoy the authentic Italian flavors.