Cook the pasta:

Cup of Yum
1. In a large pot, over medium-high heat, bring water to a boil. Once water is boiling, cook pasta, until al dente. When pasta is ready; reserve ½ cup of pasta water, drain pasta, and set aside. I personally like to reserve a little extra in case I need it. 

Make the sauce:

1. In a large skillet, saute bacon over medium-heat high.
2. When bacon is browned and just beginning to crisp, add garlic and onion. Continue to cook, stirring frequently, until bacon is brown and crisp and onions are translucent.
3. In a separate dish, whisk together eggs, parmesan, pepper and set aside.

Combine:

1. Turn heat to low and add the drained pasta to the onion, garlic, and bacon in the skillet. Mix pasta and cooked bacon and pour egg mixture over pasta.
2. Working quickly, use tongs to toss and combine pasta with egg, bacon, and onions. If pasta is too dry, add a tablespoon of reserved pasta water at a time, until a creamy consistency is reached. This will create the carbonara sauce.
3. Garnish with parsley, black pepper, and additional parmesan cheese.