Pepper Relish
["4 c. chopped green peppers", "4 c. chopped sweet red peppers", "4 c. chopped onion", "4 c. chopped celery", "1/4 c. salt", "3 c. vinegar", "3 c. sugar", "2 Tbsp. mustard seed"]
["Cover chopped vegetables with boiling water and let stand 5 minutes.", "Drain fully.", "Add sugar, vinegar, salt and mustard seed. Stir in well.", "Slowly bring to boil.", "Boil rapidly 10 minutes.", "Put into jars and seal.", "Makes 7 pints."]
["green peppers", "sweet red peppers", "onion", "celery", "salt", "vinegar", "sugar"]