Bring a large saucepan of salted water to boil and cook the pasta according to the packet instructions.
In the meantime, heat the oil over a medium heat and fry the pancetta/bacon until golden and crispy. Remove from the heat and set aside.
In a bowl, whisk the eggs, half the parmesan, the parsley. Season with salt and pepper, set aside.
Once the pasta is cooked, drain and tip back into the same saucepan in which you cooked it in.
Add the fried pancetta to the pasta and pour over the egg mixture. Mix together for 1min, check if it needs more seasoning and serve immediately with the remaining cheese and maybe some garlic bread.