Add the blueberries, lemon juice, zest, and maple syrup, (if using) to a medium sauce pot. Simmer over medium heat for about 5 minutes. You'll notice the blueberries start to burst.
Then gently mash with a potato masher or large fork until roughly half the blueberries are mashed, leaving several chunks throughout.
Increase the heat and boil for 5 minutes to reduce some of the liquid. Then turn off the heat and stir in your chia seeds.
Transfer the blueberry chia jam to clean and dry jars and refrigerate or freeze.
Notes
You need 1 large lemon for both the zest and juice. Make sure to zest your lemon before juicing it.Don't overly mash the jam into a puree. Some blueberry pieces throughout will add nice texture.If the jam seems thin after boiling, not to worry. The chia seeds will absorb most of the excess liquid as it cools.For a smoother texture (if you don't like the chia texture), grind the chia seeds before adding them to the jam.Try it with other berries like raspberries and/or blackberries. Or try our strawberry version here.Store the jam in a clean glass jar/s in the refrigerator for up to 2 weeks or freeze for up to 6 months. I like to store it in 2 separate jars, one for the fridge and one for the freezer.