Preheat the oven to 375º F.
Oil and lightly flour an 8” X 8” cake pan.
Chop 2 cups of plums into one-inch pieces.
Sprinkle the plums with ginger.
Slice 1/2 cup plums into slices to decorate the top of the cake.
Blend the oil, rice syrup, and water in a blender or mix well in a bowl.
Mix the flours, baking powder, and the salt in a separate bowl.
Add the chopped plums to the dry flour mixture.
Pour the liquid mixture into the dry ingredients.
Immediately pour the batter into a cake pan.
Decorate the top of the cake with plums.
Bake at 375º F. oven for 35 To 40 minutes.