01 - Bring 4 cups of water to a rolling boil in a large pot. Add salt and stir until dissolved.
02 - Add spaghetti to the boiling water and cook until al dente, stirring occasionally to prevent sticking. Reserve about 1 cup of the starchy pasta water before draining.
03 - While pasta cooks, heat a large skillet over medium heat. Add 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 simmer for 30 seconds to infuse the flavors.
05 - In a large mixing bowl, combine grated Pecorino Romano with 2-3 tablespoons of hot pasta water. Mix vigorously with a fork until a thick, smooth paste forms.
06 - Transfer cooked spaghetti to the skillet with the pepper infusion. Toss well using tongs to coat evenly. Remove from heat immediately.
07 - Gradually add the cheese paste to the pasta, tossing quickly and continuously. Add more reserved pasta water as needed to achieve a silky, creamy sauce that clings to each strand.
08 - Plate the pasta while steaming hot. Top with additional grated Pecorino Romano and a generous sprinkle of freshly ground black pepper.