Napolitan

Bring a large pot of water to a boil. Add 2 grams of salt to the boiling water, then add the spaghetti and cook according to package directions until al dente.

While the spaghetti cooks, prepare the vegetables and sausages. Slice the onion thinly. Slice the green bell pepper into thin strips. Slice the button mushrooms. Slice the wiener sausages into bite-sized pieces. Mince the garlic.

Heat the vegetable oil and butter in a large frying pan or skillet over medium heat.