I do a quick & cheap sauce, and a slow, more expensive sauce, whichever I have time for.

Quick & cheap:
Saute a medium sized vidalia onion in olive oil until translucent, add some chopped garlic just before the onions are done.
Add 1 small can of tomato paste, mix it in and let it heat up, stirring regularly. At this point I add a little basil, oregano, salt, and pepper. Just when you think that’s about to start burning, add a can of whole tomatoes, preferably plum. Mix it all up, turn down the heat, taste it, and adjust seasonings to taste. Let it simmer for a few minutes, and that’s about it.
If I have ground beef around, I’ll add it in with the onions and garlic, but I usually just make it without it.

I’ll save my time-consuming recipe for another time. [:)]