Clean the fish well - Nonna leaves the heads on... you do what you prefer.
In a pot put together: 3 quarts of water, olive oil, garlic, tomatoes and the parsley.
Bring everything to a boil and let it boil for about 15 minutes.
Add the merluzzi and cook for another 10 minutes.
Separately cook pasta, Nonna always uses cut spaghetti... you can use any pasta that you prefer.
Mix the pasta with the soup and serve.