Rinse and drain beans.
Preheat oven to 350° F.
Zest one lemon and juice 2 lemons.
Place all ingredients except the bluberries in food processor and blend until completely smooth. Stir in blueberries.
Spread in greased 8x8 baking pan. Top with additional blueberries if desired.
Cook for 20 minutes then remove from oven and cool for at least 15 minutes before cutting.