01 - Wash oranges and lemon thoroughly. Remove zest from 2 oranges using a fine grater or zester, avoiding the white pith.
02 - Juice all 4 oranges and the lemon, strain to remove seeds and excess pulp, yielding approximately 2 cups of juice.
03 - In a large saucepan, combine orange juice, lemon juice, orange zest, and water.
04 - Sprinkle pectin evenly over the juice mixture and stir to combine.
05 - Bring mixture to a gentle boil over medium heat, stirring constantly.
06 - Add granulated sugar all at once, stirring until fully dissolved.
07 - Increase heat to reach a full rolling boil. Boil vigorously for 1 to 2 minutes, stirring continuously.
08 - Remove saucepan from heat and skim off any foam from the surface using a clean spoon.
09 - Pour hot jelly into sterilized jars, leaving a 1/4-inch headspace. Seal immediately.
10 - Process jars in a boiling water bath for 10 minutes for long-term preservation. Allow to cool undisturbed.