For the Fleers, this relish serves as everything from a sandwich spread to a topping for fresh peas and succotash. John uses his grandmother's grinder, but you can chop the peppers and onions as directed.
Combine first 7 ingredients in a saucepan, and bring to a boil over medium-high heat. Stir in peppers and onions; reduce heat, and simmer 5 minutes. Remove from heat, and let cool. Cover and chill up to 2 weeks.