Easy Hot Pepper Jelly

Cut stems and chop peppers, leaving in seeds. Cover with water and simmer until tender. Mash through strainer to obtain more juice, then strain juice through cheesecloth in order to have clear jelly. Add sugar and vinegar to juice. Rapidly bring to a boil and add lemon juice and Certo. Boil hard for 1 minute. Remove from heat and skim off foam. Pour into sterile jars and seal. Yield: 8 half pints.