Cook the pasta in 3-4 l boiling salted water (1 teaspoon salt per litre) according to the package instructions.
In the meantime cut off the rind from the bacon. Dice the bacon finely. Peel garlic and chop finely.
Fry the bacon in a pan without fat until crispy. Add oil to the pan. Add garlic and fry for about 1 minute. Remove the pan from the heat.
Whisk the eggs in a large bowl with a whisk. Mix in the bacon and garlic together with the frying fat.
Grate 50 g Parmesan cheese directly above the bowl to make the egg-bacon mix. Mix everything well. Season well with salt and pepper.
Pour the pasta into a sieve, collecting about 100 ml of pasta water. Drain spaghetti briefly.
Fold the noodles and 4-5 tablespoons of noodle water into the egg-bacon mix. This works best with a fork. Mix everything thoroughly and quickly. Serve. Because more cheese is simply the best: grate the rest of the Parmesan cheese and sprinkle it over the spaghetti together with coarse pepper.