Removed the stones from the plums and add them together with the syrup into a stand-up blender.
30 oz plums
Add 2 tsp lemon juice and 1/8 tsp ground cinnamon to the plums. Blend everything for 1-2 minutes until smooth. You can also use a food processor, stick blender, or mash everything with the back of the fork or a potato masher if needed.
2 tsp lemon juice, 1/8 tsp ground cinnamon
Fill ice block molds or a large freezer-proof bowl with the blended plums. Depending on your ice block molds, add wooden sticks an hour into freezing the mixture.
Freeze the ice pops for 8 hours or until they're fully set. Remove the carefully from the molds or serve the sorbet scooped in dessert ups or cones.
Notes
Storage: You can store ice blocks in the freezer for up to 3 months. Just make sure you store the ice blocks in a tightly sealed container or bag to minimize exposure to air and moisture.