Green Pepper Relish 18 green peppers 6 red peppers 12 medium sized onions 2 cups sugar 4 tablespoon salt 1 quart of vinegar Chop peppers and onions or put through a food grinder. cover with boiling water and let stand for 5 minutes. Drain Add sugar , salt and vinegar. Boil for 20 minutes. Put in jars and seal. This relish will keep indefinitely. Back To Canning Recipes.