01 -
Line 12x9 inch baking sheet with parchment paper, clip sides if desired.
02 -
Let blueberries thaw slightly then mash with fork until flattened.
03 -
Combine mashed berries with yogurt and optional ingredients.
04 -
Spread mixture evenly on pan about 1/4-1/3 inch thick.
05 -
Freeze 1.5-2 hours until firm then break into pieces.