01 - Place berries in a medium saucepan over medium heat. Cook, stirring occasionally, until berries begin to break down and release juices, approximately 5 minutes.
02 - Use 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 well combined.
04 - Remove from heat and let mixture rest for at least 5 minutes, stirring occasionally. The jam will thicken as chia seeds absorb liquid.
05 - Taste jam and add additional sweetener if needed to achieve desired sweetness level.
06 - Transfer jam to clean jar. Allow to cool completely before sealing with lid.
07 - Store in refrigerator for up to 1 week. Jam is not shelf-stable and must remain refrigerated.