Put the peppers and onions in a heavy enamel or stainless-steel saucepan. Add sufficient water to cover and bring to a boil over high heat. Boil for 1 minute, then drain well in a colander. Return the vegetables to the pan and add the remaining ingredients. Bring the mixture to a simmer over low heat and cook for 5 minutes. Let cool, pack into hot sterilized jars and attach the lids. Process in a boiling water bath for 5 minutes. Remove from the water and cool completely at room temperature. Makes about 3 pints.