Pour in tomato sauce and add salt, pepper, and sugar to taste. https://www.tasteofhome.com/collection/easy-dinner-recipes-using-pasta-sauce Add onions and garlic and saute for a minute or so. Cook pasta according to package directions. Remove from heat and stir in cream. https://www.marthastewart.com/904229/pasta-fresh-tomato-sauce https://www.allrecipes.com/recipe/23404/tomato-cream-sauce-for-pasta Drain, reserving 1 cup of pasta water. Stir and cook over low heat for 25 to 30 minutes, stirring occasionally. Heat butter and oil over medium heat.