Rhubarb Relish - cooking recipe

Ingredients

5 cups chopped rhubarb
5 cups chopped onions
2 1/2 cups cider vinegar
6 cups packed brown sugar
1 tablespoon table salt
1 teaspoon pepper
1 teaspoon ground cinnamon
1 teaspoon ground cloves

Preparation

Put rhubarb, onion and vinegar into large saucepan. Bring to a boil over medium heat. Cook uncovered for 20 minutes. Stir often.
Add remaining ingredients.
Stir.
Continue to cook until thick, stirring often, about 30 minutes.
Pour into hot sterilized half pint jars to within 1/2 inch of the top. Place sterilized metal lids on jars and screw metal bands on securely. For added assurance against spoilage, you may choose to process in boiling water bath for 10 minutes.