Heat berries and lemon juice in a medium saucepan over medium heat. Allow berries to heat through and start to break down a bit (mixture will start to bubble). Then, mash berries with a potato masher until broken up to your desired consistency. Reduce heat to medium-low and continue to simmer for about 5-7 minutes.

Next, stir in the chia seeds and cardamom. Once mixed well, taste and if desired, add 1-2 Tbsp of raw honey.

Remove from heat and stir in the vanilla extract. Cool jam in saucepan until it reaches room temperature. Then, pour into jars and cover with lids. Place in the refrigerator and use within 2 weeks or store in the freezer for up to 3 months.