In a large container, combine peppers and onions. Cover with water. Let stand for 20 minutes; drain well. In a large kettle, combine remaining ingredients; bring to a boil. Add pepper mixture; cover and simmer for 20 minutes. Pour hot mixture into hot jars, leaving ¼-inch headspace. Adjust lids. Process for 15 minutes in a boiling water bath. Yields 7 pints.