If I'm not making Mom's Spaghetti Sauce, then I usually use some bottled version of tomato and basil or marinara sauce. (If anyone has a good recipe for these, PLEASE let me know!) When I use jarred sauce, I add in just a touch of brown sugar when I heat it on the stove. SO good! Try it - add just a touch at a time until it's just right to you. You just want a little taste of sweetness, so go slow. Enjoy!