Napolitan spaghetti

Method

1. 1 Boil the spaghetti in salted boiling water for 10 minutes, slightly overcooked, then drain, toss with a little butter, and let cool for 5 minutes.
2. 2 Slice the sausage diagonally, cut the onion into wedges, julienne the bell peppers, and thinly slice the mushrooms.
3. 3 Melt unsalted butter in a pan, sauté the sausages for 2 minutes until browned, then add the onions, bell peppers, and mushrooms and sauté for another 3 minutes.
4. 4 Push the vegetables to one side, pour the ketchup into the empty part of the pan, and cook for 1 minute to reduce the strong acidity.
5. 5 Add the noodles to the pan, stir well with the sauce and fresh milk for 3 minutes until each noodle strand turns glossy red.
6. 6 Season with salt and pepper, arrange on a plate, sprinkle with grated cheese, and serve hot.