How To make Sweet Onion Pepper Relish

1 qt Sweet onions
2 c Sweet red peppers
2 c Sweet green peppers
1 c Sugar
1 qt Vinegar
4 ts Salt
1 c Chopped cabbage
From Cathy Dorsey, New River, AZ Chop onions and peppers finely. Combine all ingredients and bring slowly to a boil. Cook until slightly thickened. Pour into hot sterile jars. Fill jars to within 1/2 inch of the top. Seal. Makes 3 to 4 pints. Source: Rock Springs Sweet Onion Festival Cook Book 1992