I found this recipe somewhere on the web. (I can't remember where to give them the credit.) Most recipes call for starting with tomato paste but this one truly starts from scratch. I made a batch last summer and we really enjoyed it! The ways to personalize the seasonings are endless!
Homemade Barbecue Sauce
2 gallons chopped tomatoes
4 chopped onions
2 cups chopped celery (optional, in other words, I didn't have it and it turned out okay!)
3 cups chopped red or green sweet peppers (mixed is good)
6 garlic cloves, crushed
2 cups vinegar
1 1/2 cup brown sugar
3 T Worcestershire sauce
2 tsp crushed red pepper (more or less depending on your preference)
2 T paprika
2 T dry mustard ( or 3 T wet mustard)
3 tsp salt
1 tsp liquid smoke of your choice (hickory, mesquite, or whatever)
1/2 tsp pepper
any other seasonings use wish (I added cumin, lemon pepper and chili powder.)
Cook tomatoes until soft. Drain off extra water. Run through food mill.
Cook onion, celery, peppers, and garlic until soft. Blend in blender. Put through food mill.
Return tomatoes and vegetables to large pot and simmer uncovered for about an hour to hour and half. Mixture should thicken.
Stir in the remaining ingredients and any other seasoning of your choice. You could add 1/2 cup honey and reduce the sugar by 1/2 cup. Make it more or less smoky as your family desires. Simmer for about an hour on very low heat. If still not thick enough, you could add clear gell or cornstarch, mixing it with a little juice before adding to the pot.
Place in jars and process in canner for 20 minutes.
Disclaimer: Though this recipe has worked for me, it has not been tested for safety by the experts. Please use at your own risk.