Once the blueberries are defrosted (or mostly defrosted) add to a blender or food processor.
Add lemon juice, water, and maple syrup.
Blend for about a minute, or until thin and well blended.
Pour blueberry mixture into a small saucepan. Heat mixture until just luke warm, one to two minutes - the gelatin incorporates better when the blueberry mixture isn't very warm.
Once the mixture has warmed just a bit, slowly add gelatin, whisking constantly.
Once all of the gelatin is mixed thoroughly, pour mixture in to an 8x8 baking dish. Place dish in the fridge to cool for about an hour.
Remove from fridge and slice into small squares (I cut like I’m cutting tiny pieces of brownies). Store in fridge for up to one week.