01 - Place berries in a medium saucepan over medium heat. Cook, stirring occasionally, until berries begin to break down and release their juices, approximately 5 minutes.
02 - Use a fork or potato masher to mash berries to preferred texture, whether chunky or smooth.
03 - Stir in maple syrup or honey, chia seeds, vanilla extract, and lemon juice until thoroughly combined.
04 - Remove from heat and let mixture stand for at least 5 minutes, stirring occasionally. Jam will thicken as chia seeds absorb liquid.
05 - Taste jam and add additional sweetener if desired.
06 - Transfer jam to a clean jar. Allow to cool completely before sealing and refrigerating.
07 - Store in refrigerator for up to 1 week.