Heat the olive oil in a pan.
Add the sausage meat and brown.
Throw in the bell peppers, diced tomatoes and onions. Sprinkle with salt and pepper. Cook, stirring occasionally, for a couple of minutes.
Pour in the tomato puree and sprinkle in the oregano. Stir. Taste. Add more salt and pepper, as needed, and a bit of sugar to balance the acidity of the tomatoes.
Bring to the boil, cover and simmer for about 10 minutes.
Add the pasta, stir and continue simmering, covered, for another five minutes or until the pasta is al dente and has soaked up most of the sauce.
Divide the cooked pasta among three to four bowls, sprinkle with parsley, basil and grated Parmesan. Serve immediately.