Chop garlic scapes into pieces. Add to food processor bowl. Process until fine pieces. Peel the onions and quarter. Process them until fine. Deseed the red bell pepper. Process them too.
10 cups garlic scapes, 3 cups onions, 4 red bell peppers
Mix chopped vegetables in a large bowl. or a plastic storage bag. Add salt. Mix well. Let sit on counter or in refrigerator overnight. See important notes below!
5 tablespoons Salt
For Relish
Next morning, rinse mixture well, with cold water, in a colander.
Add to large pot. Add remaining ingredients.
3 cups Sugar, 3 cups apple cider vinegar or white vinegar, 1 teaspoon turmeric, 1 teaspoon dry mustard, 1 teaspoon Black Pepper, 1 teaspoon celery seed
Bring to boil. Low boil for about 30 minutes, until relish consistency.
Pack and seal in hot jars. Refrigerate for at least 6 months.
For longer storage, and to make shelf stable, process pint jars in water bath canning pot for 15 minutes, adjusting for elevation.
Canning Instructions
Once the relish is at a good consistency, heat jars and start your boiling-water canner.
Pack hot finished relish into hot jars.
Remove air bubbles.
Wipe rims of jars with damp paper towel to remove debris.
Center warmed lid on jar. Screw on band fingertip tight.
Process jars for 15 minutes, adjusting for altitude. (See notes below for altitude adjustment.
Notes
Note: One batch makes 5 1/2 pints of relishNote: Grate vegetables in a food processor with grater attachment, for faster preparation!Use a non reactive or plastic colander. Stainless steel can be ruined by the salt and ruin the relish!Store opened jars in the fridge.If you don't want to can it, you can store jars, unopened in the fridge for about 6 months.Adjustment for altitude0-3000 feet above sea level process 15 minutes3000-6000 feet above sea level process 20 minutesabove 6000 feet process 25 minutes