Bring a large pot of salted water to a boil.

Add the spaghetti and cook according to package instructions until al dente, about 8-10 minutes.

While the pasta cooks, heat a skillet over medium heat and add the diced pancetta or bacon. Cook until crispy, about 4-5 minutes.

In a mixing bowl, whisk together the eggs and grated Parmesan cheese until well combined.

Stir in the minced garlic into the skillet with the bacon and cook for another minute until fragrant.

Once the pasta is cooked, drain it and add it to the skillet with the bacon and garlic. Mix well.

Remove the skillet from heat and pour the egg and cheese mixture over the pasta. Toss vigorously to combine.

Season with freshly ground black pepper and additional cheese if desired. Serve immediately.