In a Dutch oven, combine the apple juice, pectin, lemon juice and food coloring if desired. Bring to a full rolling boil, stirring constantly. Quickly stir in sugar; return to a full rolling boil. Boil for 2 minutes, stirring constantly.
Remove from the heat; skim off foam. Stir in cinnamon. Carefully ladle hot mixture into hot sterilized jars, leaving 1/4-in. headspace. Remove air bubbles; wipe rims and adjust lids. Process for 5 minutes in a boiling-water canner.
The processing time listed is for altitudes of 1,000 feet or less. Add 1 minute to the processing time for each 1,000 feet of additional altitude.