Place berries in a large bowl and allow to thaw for an hour.
Use the water from soaking cashews to water plants. Then rinse the cashews and place in the blender.
Add water to the blender, as much or as little as you would like depending on thickness desired.
Blend until there are no more chunks of cashews.
Pour into the berry bowl, and add chia seeds and vanilla extract. Mix well and then leave for 15 minutes.
You may serve either immediately or chill for an hour first. Enjoy!