Cook pasta according to package directions. Drain, reserving 1 cup of pasta water.
Heat butter and oil over medium heat. Add onions and saute for a minute or so. Pour in 825 MAIN Pizza Margherita Sauce and add salt to taste. Stir and cook over low heat for 25 to 30 minutes, stirring occasionally.
Remove from heat and stir in cream. Check seasonings. Stir in pasta and chopped basil and serve immediately.