Rhubarb Orange Jam

Alex found this recipe online and modified it slightly.
It's DELICIOUS! I like it in yogurt.

https://www.allrecipes.com/recipe/86346/rhubarb-jam/

2.5 pounds chopped rhubarb
1 to 1.5 cups sugar (1 cup worked fine but isn't as flavorful)
1/3 c orange juice
zest of one orange (optional; adds zing)
1/2 cup water
1 box pectin (optional; adds nice texture)

In a saucepan, combine the rhubarb, sugar, orange zest, orange juice, and water. 
Bring to a boil, then cook over medium-low heat for 45 minutes, stirring occasionally, or until thick. 
It will thicken more as it cools.
Add pectin if desired.