Bring 3-4 l salt water (approx. 1 teaspoon salt per litre) to the boil. Grate Parmesan finely. Whisk eggs, cream and 50 g Parmesan. Season with a little salt and pepper and put aside. Cook spaghetti in boiling salted water according to package instructions.
Peel garlic and dice finely. Heat oil in a pan and fry bacon until crispy. Add garlic and fry briefly. Drain the noodles and let them drain.
Put the spaghetti back in the pot. Mix in the bacon-garlic mixture and remove from the heat. Add the egg and cheese mixture and mix thoroughly with the noodles. The egg sauce should be greasy and not start to curdle.
Arrange the noodles on plates. Sprinkle with the remaining parmesan and coarse pepper.