01 - Place berries in a medium saucepan over medium heat. Cook, stirring occasionally, until berries begin to break down and release their juices, about 5 minutes.
02 - Use a fork or potato masher to mash berries to your preferred texture—chunky for preserves or smooth for traditional jam consistency.
03 - Stir in maple syrup (or honey), chia seeds, vanilla extract, and lemon juice until well combined.
04 - Remove from heat and let mixture sit for at least 5 minutes, stirring occasionally. The jam will thicken as chia seeds absorb the liquid.
05 - Taste the jam and add more sweetener if needed to reach your preferred sweetness level.
06 - Transfer jam to a clean jar. Allow to cool completely before sealing. Refrigerate for up to 1 week.