Instructions
Prepare sterile half-pint jars and lids. Wash and finely chop the onions and peppers.
Combine all ingredients in a large pot and bring to a boil.
Boil gently until the mixture is thickened and its volume is reduced by about half, approximately 30 minutes.
Pack hot relish into hot sterile half-pint jars, leaving 1/2-inch headspace. Remove bubbles, adjust headspace, wipe rims, and apply lids.
Process half-pints or pints for 5 minutes at 0–1,000 ft, 10 minutes at 1,001–6,000 ft, or 15 minutes above 6,000 ft. Cool 12 to 24 hours and check seals.