01 - Bring 4 cups of water to a rolling boil in a large pot. Add 1/2 teaspoon of salt to season the water.
02 - Add the spaghetti to the boiling water. Cook until al dente, stirring occasionally to prevent sticking. Reserve about 1 cup of the starchy pasta water before draining.
03 - While the pasta cooks, place a large skillet over medium heat. Add the freshly ground black pepper and toast for 1 minute until fragrant, stirring constantly.
04 - Pour 1/2 cup of the reserved hot pasta water into the skillet with the toasted pepper. Let the mixture simmer gently.
05 - In a large mixing bowl, combine the grated Pecorino Romano with a few tablespoons of hot pasta water. Mix vigorously to form a thick, smooth paste.
06 - Transfer the cooked spaghetti to the skillet with the pepper-infused water. Toss well to coat the noodles evenly, then remove from heat.
07 - Gradually add the cheese paste to the pasta, tossing quickly and constantly. Add more reserved pasta water as needed to achieve a creamy, silky sauce that clings to each strand.
08 - Plate the pasta immediately. Top with additional grated Pecorino Romano and an extra sprinkle of freshly ground black pepper.