Put the pasta in boiling water without salt or oil. Use the duration from the package.
Dice the calabresa and fry without any oil, the calabresa will release a lot of fat and it is already very salt.
Dice the onion and smash the garlic. Put it with the calabresa when it start to get dry. Fry until the onion release water.
Add the tomate sauce and the basil. Cook until the sauce start to boil. Keep stirring.
Drain the water on the pasta pot and mix with the sauce. Add parmesan and oregano. Serve.