Add the washed and chopped berries (or puree for a smoother jam) to a saucepan over medium heat and star and cook until the berries are softened in the case of the chopped berries, or fully warmed through in the case of the fruit puree.
Add in the honey or sweetener you choose along with the juice of half a lime and continue to stir over the stove until the sweetener is well incorporated. If using chopped berries, press against them with a wooden spatula to help make more of a lumpy sauce. If using fruit puree, keep stirring until it appears to slightly thicken.
Remove the pan from the heat and add in the chia seeds and vanilla extract. I made my first batch without the vanilla, but I later realized that adding in the vanilla gave it a depth of flavor that completely changed the jam for the better.
Thoroughly stir in the chia seeds and wait a couple of minutes for them to gel up and thicken your jam. If you feel like it is not thick enough, you can try slowly adding in more chia seeds a little at a time.
Store in the refrigerator for up to 1-2 weeks. The jam will slightly thicken up when cold.