Easy Cacio e Pepe

basically elegant Italian mac and cheese. Pepper may be added to your liking.

Ingredients

Bring a large pot of lightly salted water to a boil. Cook bucatini pasta in the boiling water, stirring occasionally, until almost tender yet still firm to the bite, 8 to 9 minutes; they will not be fully cooked. Drain, reserving about 2 cups of pasta cooking water. Set pasta aside.
Combine Pecorino Romano cheese and 1/2 cup grated Parmigiano-Reggiano cheese in a bowl. Add 2 tablespoons of pasta water and stir into a thick paste.
Heat olive oil in a skillet or saucepan over medium-low heat; swirl to coat the bottom. Add cheese paste and a ladle of pasta water; whisk vigorously to combine. Keep whisking quickly and vigorously to make sure the cheese does not clump, about 30 seconds. Add cooked pasta and black pepper. Keep tossing skillet contents continuously until cheese has coated the pasta evenly and bucatini are cooked al dente, about 2 minutes. Add more water or cheese if the pasta sauce appears too thin or thick.
Serve immediately topped with shredded Parmigiano-Reggiano cheese and more black pepper.
You can also toast your own peppercorns. Heat a skillet to medium-low heat. Toast peppercorns in the dry skillet until fragrant, 1 to 2 minutes. Grind up toasted peppercorns in a spice grinder or food processor.