Grated Parmesan cheese In a large skillet, heat the quarter cup of olive oil over medium heat; add the onion and saute until tender (do not brown). Add the garlic and saute for one minute. Stir in the tomatoes; reduce the heat to medium low and simmer, stirring occasionally, until the sauce is slightly thickened, about 25 minutes. Add the salt and pepper to taste. In a large pot of boiling salted water, cook the pasta to desired doneness; drain well and place in a large bowl. Stir the tablespoon of olive oil into the sauce, then pour over the pasta. Add the basil and toss to blend. Sprinkle with Parmesan cheese, if desired, and serve.