I often make a meat spaghetti sauce in the crock pot. It usually has whatever is handy in it--browned ground beef, onions, green pepper, celery, tomato sauce, tomato paste (keeps it from being too runny) and whatever spices strike my fancy. I have also made a pretty good spaghetti sauce in the microwave. Cook the ground beef first (if you are using it), then the vegetables. Add the tomato sauce, tomatoes, tomato paste and cook for about 12 minutes--stirring it a couple of times. I think I actually have a recipe that I got from my mother, but I rarely use it--just put what I like in it.
Garnett had long known. . . that God's world and the better part of daily life were full of mysteries known only to women.
--from "Prodigal Summer" by Barbara Kingsolver