Combine all DRY ingredients in a large bowl. In a smaller bowl, mash ripe banana, and add all wet ingredients and mix well.
Spread mixture into 8×8 or 9×9 baking dish lined with plastic wrap or waxed paper. Press until flat.
Place dish in freezer for a few hours, or until firm. Remove from dish and carefully cut into 15 squares/bars or logs. For easy grab-and-go snacks, wrap bars individually in plastic wrap.
Store in fridge or freezer for up to a month. These bars soften quickly at room temperature.
Makes 15 protein/granola bars.