It's not as good as the fresh salsa, but it does last longer which can be helpful if you have a lot of tomatoes to use and want to save some jars for the future. I believe this one originated with the "More With Less" cookbook.
Combine and set aside the following:
14 cups tomatoes peeled, chopped, drained
3 cups onion chopped
1/2 cup chili peppers chopped (more if you like)
1-3 cups green, yellow and red sweet peppers chopped
Combine the following and cook until it is thick and a clear, dark colour:
1 cup tomato sauce
1 cup ketchup
3/4 cup vinegar
10 tbsp cornstarch
2.5 tbsp salt
1 tbsp chili power
1.5 tsp ground cumin
2-3 cups corn (optional)
2-3 cups cooked black beans (optional)
Add sauce to drained veggies and optional ingredients. Ladle into hot sterilized pint jars to within 1/2 inch of top. Seal with sterilized lids, and process full jars in boiling water bath for 35 minutes. If you use the corn and/or beans due to the lower acidity of this variation, do not can in a boiling water bath, only pressure canning is recommended.
8-10 cloves garlic minced