From my South Pacific e-cookbook, looks simple and yummy. I guess that 3 cups of mashed sweet potato is about 3 large ones? Can easily be veganized using almond, soy, etc. milk instead. If you don't have self-rising flour, use 1 cup all-purpose flour with 1/2 tsp salt and 1/4 tsp baking soda. I imagine this would also be tasty with pumpkin puree and a little pumpkin pie spice. The cinnamon is my addition because they appeared too bland otherwise.