For the first layer, combine the flour, sweetener, oil, orange zest and salt in a food processor until blended. Add the walnuts and process until chopped. Press the mixture into the bottom and up the sides of a bundt pan.
For the second layer, blend the ingredients for the second layer together in a food processor or blender until smooth and creamy. Pour and spread on top of the first layer.
For the third layer, mix together the flour, walnuts, baking powder, baking soda, cinnamon, salt and nutmeg. Beat together the soy milk, sweetener, oil and orange juice, add the dry ingredients and beat until smooth. Pour and spread this mixture over the second layer, being careful not to stir the second and third layers together.
Bake for 40-45 minutes. Let cool 15 minutes, then loosen the edges and turn out onto a rack to cool.
posted by Mr Falafel