01 - Bring 4 cups of water to a rolling boil in a large pot. Stir in the salt until dissolved.
02 - Add spaghetti to the boiling water and cook until al dente, stirring occasionally to prevent sticking. Before draining, reserve approximately 1 cup of the starchy pasta cooking water.
03 - While pasta cooks, heat a large skillet over medium heat. Add the freshly ground black pepper and toast for 1 minute until fragrant, stirring constantly to prevent burning.
04 - Pour 1/2 cup of the reserved hot pasta water into the skillet with the toasted pepper. Let simmer gently over low heat.
05 - In a large mixing bowl, combine the grated Pecorino Romano with 2-3 tablespoons of hot pasta water. Whisk vigorously until a thick, smooth paste forms.
06 - Transfer the cooked, drained spaghetti to the skillet with the pepper-infused water. Toss thoroughly with tongs to coat evenly. Remove from heat.
07 - Gradually incorporate the cheese paste into the pasta, tossing rapidly with tongs. Add additional reserved pasta water as needed to achieve a silky, creamy sauce that clings to each strand.
08 - Plate immediately while hot. Garnish with additional grated Pecorino Romano and a generous grinding of fresh black pepper.