Bring 3-4 l salted water (1 teaspoon salt per litre) to the boil. Peel onions and garlic and chop finely. Dice the bacon. Heat oil in a pan and fry bacon for about 6 minutes. After about 3 minutes add onions and garlic.
Wash mint, shake dry, chop leaves. Grate the parmesan. Whisk cheese and eggs in a large bowl.
Meanwhile cook the noodles in boiling salted water according to the instructions on the packet until al dente. Drain finished noodles, collecting approx. 150 ml of noodle water.
Add the pasta to the pan. Add frozen peas and pasta water. Bring to the boil and simmer for about 2 minutes. Add everything to the egg mixture and mix in immediately. Season to taste with salt and pepper. Sprinkle with mint.