In a large bowl whisk together the egg yolks, Romano cheese, and cracked pepper until combined. Temper the eggs by whisking in ½ of the hot rendered guanciale fat from the pan until combined.
Next, add in the homemade pasta to a large pot of boiling salted water and cook for 2 minutes. While the pasta is cooking take ¼ cup of the hot boiling pasta water and whisk it into the egg mixture.