1 qt. onion, finely chopped
1 pt. sweet red pepper, finely chopped
1 pt. green pepper, finely chopped
1 c. sugar
1 qt. vinegar
4 tsp. salt

Combine all ingredients and bring to a boil. Boil gently until mixture is thickened and reduced about 1/2 in volume (about 45 minutes), stirring occasionally. Pack the boiling hot relish into clean, hot jars; fill to top of jar. Seal tightly. Store in refrigerator.