Stir together flour, cinnamon, ginger, nutmeg, peanuts, raisins and coconut. Set aside.
Add sweet potato and banana flesh to a large bowl. Mash well. Add brown sugar, vegetable oil, vanilla extract and eggs. Stir together. Add flour mixture and stir only until the dry mixture is wet. Pour into a greased and floured loaf pan. Bake in a 350 degree preheated oven for 45 minutes or until toothpick inserted comes out clean. Remove from pan after 10 minutes and cool on a rack.
MY NOTES ~ I omitted the peanuts and raisins at my son's request.