01 - Combine berries in a medium saucepan over medium heat. Cook for 5 minutes, stirring occasionally, until berries break down and release their juices.
02 - Use a fork or potato masher to mash berries to your preferred texture—chunky for preserves-style or smooth for traditional jam consistency.
03 - Stir in maple syrup (or honey), chia seeds, vanilla extract, and lemon juice until fully incorporated.
04 - Remove from heat and let mixture stand for 5 minutes, stirring occasionally. The chia seeds will absorb liquid and naturally thicken the jam.
05 - Taste the jam and add additional sweetener if needed to achieve desired sweetness level.
06 - Transfer jam to a clean glass jar. Allow to cool completely to room temperature before covering with lid.
07 - Store sealed jar in refrigerator for up to 1 week. Jam must remain refrigerated as it is not shelf-stable.