1. Cook the pasta according to package instructions until al dente.

2. In a separate bowl, whisk together the egg yolks, grated Parmesan cheese, salt, and pepper.

3. Drain the cooked pasta and immediately add it to the bowl with the egg yolk mixture. Toss well to coat the pasta evenly.

4. The heat from the pasta will cook the egg yolks slightly, creating a creamy sauce.

5. Serve hot and garnish with additional grated Parmesan cheese and freshly chopped parsley, if desired.