In a blender or food processor, combine the fresh blueberries, honey, vanilla extract, lemon juice, and salt. Blend until smooth. If you prefer some texture, pulse a few times to leave some blueberry chunks.
In a mixing bowl, add the Greek yogurt and gently fold in half of the blueberry mixture, creating a swirl effect. Do not fully mix; you want to see both the yogurt and the blueberry mixture.
Line a muffin tin with silicone molds or paper liners. Spoon the yogurt mixture into each mold, filling them about three-quarters full.
Top each yogurt bite with a small amount of the remaining blueberry mixture and a sprinkle of granola if desired.
Place the muffin tin in the freezer and freeze for at least 4 hours or until solid.
Once frozen, remove the yogurt bites from the molds and store them in an airtight container in the freezer for up to 2 months.