Before diving into cooking, make sure you have all your ingredients laid out. Nothing is worse than starting to cook only to realize you're missing something. Once you have everything ready, you’re set for a smooth cooking experience.

Fill a large pot with water and add a generous pinch of salt. Once it reaches a steady boil, add the spaghetti. Stir it occasionally to prevent it from sticking together. Cook the pasta for about 10-12 minutes, just until it reaches that perfect al dente texture—firm to the bite but not hard. While the pasta cooks, it's time to prepare the garlic oil.

In a large skillet, pour in the extra-virgin olive oil and add the thinly sliced garlic. Start on medium heat and allow the garlic to gently infuse the oil without burning. This gradual heating will take about 10 minutes. Keep an eye on it; you want the garlic to turn golden-brown, not dark. When you notice bubbling around the edges, reduce the heat to medium-low and keep stirring for an additional 5 minutes.

When the spaghetti is cooked, reserve about a cup of the pasta water and drain the rest. Toss the hot pasta in a large bowl. Immediately stir in the crushed red pepper flakes, salt, and freshly ground black pepper. Now, pour the hot olive oil and the beautifully golden garlic over the spaghetti, adding in some of the reserved pasta water for a creamier texture. Toss it all together, ensuring the pasta is coated in that rich garlic oil.

Now, it’s time for the fresh Italian parsley and half of the grated Parmigiano-Reggiano cheese. Toss once more to combine these fresh elements into your pasta. It will brighten up the dish! Serve your aglio e olio immediately, topped with the remaining cheese to really wow your guests.