Cook the Pasta: Boil a large pot of salted water. Add the spaghetti and cook according to the package instructions until al dente. Reserve about 1 cup of pasta water, then drain the pasta.
Prepare the Sauce: In a mixing bowl, whisk together the eggs and grated Parmigiano-Reggiano cheese until smooth. Add a generous amount of freshly cracked black pepper.
Combine Pasta and Sauce: In a large mixing bowl or pot, combine the drained pasta with the egg and cheese mixture. Toss quickly to ensure the sauce coats the pasta thoroughly. If the sauce is too thick, add a little reserved pasta water to help reach a creamy consistency.
Optional Step: If you're using olive oil, drizzle it over the pasta as you mix for additional flavor.
Serve: Plate your Pasta alla Carbonara and sprinkle with more cheese and black pepper. Garnish with chopped parsley if desired. Enjoy!