I think this may have come from American Whole Foods Cuisine. I modified it a bit. I haven't made this in a while, so I'm guessing at the serving amount. What you don't use freezes well.
- Saute garlic, onion, & green pepper in oil for about 5 minutes until softened.
- Add chili powder and cook briefly.
- Add tomato, seasonings, and vinegar; cover & cook for 20 minutes until vegetables are tender.
- Uncover and cook 10 minutes longer.
- Puree in the blender or mash with a fork.