Cut ingredients and boil water

Mix sauce ingredients.

In a medium heat pan, put butter, olive oil and onion and fry.

Start boiling spaghetti for 7-8 min.

In the same pan, without washing, put sauce ingredients and cook with medium heat.

When sauce gets shiny and starts bubbling, put the vegetables and sausage back to the pan.

Mix and cook for a while and turn off heat.

When spaghetti is done, put spaghetti and boiled water in the sauce and cook.