Arbetus berries are also known as the strawberry tree fruit, but they should not be confused with the kind of strawberries you usually eat. These are quite tart and benefit from being combined with lots of sugar, as when making this recipe for jam. If you can't find arbetus berries, feel free to swap in other berries, including strawberries, but you may want to take down the sugar in the recipe depending on their sweetness.
- In a saucepan, add the rinsed arbutus, sugar, cinnamon stick and lemon juice. Mix well.
- Bring to a boil over medium heat. Lower heat and simmer for about 30 minutes, until the jam reaches setting point or 220°F.
- Remove the cinnamon stick and puree with a hand blender.
- Pour the jam into sterilized jars, let cool and refrigerate.