Here's how I do it:
Heat the oil in a large pan over a medium heat. Add the onions and cook until they are soft and translucent, about 5 minutes. Add the garlic and cook for 1 minute more. Add tomato sauce, tomato paste, water, vinegar, molasses, honey, Splenda, pepper, salt and Woozie sauce. Bring to a boil. Reduce heat to medium-low and simmer for 45 minutes
NOTE: If you are using leftover chicken from the sandwich recipe, your chicken is already coated in the sauce and has probably absorbed a good bit of it. Add 1/2 cup ketchup and 1 tsp chili powder to the skillet to loosen up the sauce a bit.
4. Top cooked spaghetti (or any pasta) with chicken, sauce and shredded cheddar cheese.