chia blueberry jam

recipe:
1 cup frozen wild blueberries
1/2 cup of water
2 tsp of white vinegar ( that's my preservative)
2 tbsp of chia seeds
2 tbsp of erythritol or any sweetener of choice

method:
in a small sauce pan heat your frozen blueberries and water till its thawed
wait till its hot then transfer to a blender and puree it, if your using a fresh berries puree it first before putting in a saucepan.
add the remaining ingredients and bring to a soft boil.
wait for the chia to thickens.
when the sauce thickens cool it down then transfer in a jar.
if your not going to put vinegar i don't think you need to add sweetener.