Combine all the ingredients except the nuts in a food processor or blender and blend just until smooth. Do not overblend or you will end up with a gluey texture from the beans.
Stir in half the walnuts; reserve some to put on top. Pour into the baking dish or ramekins.
Bake for 20-30 minutes (ramekins) and 30-40 minutes (baking dish) until the tops are dry and the edges start to pull away from the sides.
Notes
Per serving:
221 calories
9 g fat
0 g cholesterol
84 mg sodium
309 mg potassium
28 g carbohydrate
5 g fiber
16 g sugars
7 g protein
6 Weight Watchers Points Plus
Top with a dollop of nonfat Greek yogurt sweetened with a little honey if you like. I freeze the extras and thaw in the microwave when I need a hit of chocolate.