Combine and mix thoroughly the flour, sugar, baking soda, salt, allspice, nutmeg, and cinnamon. In a large mixing bowl, blend the cassava (or pumpkin), eggs, oil, and optional ingredients. Mix well. Fold in optional nuts and coconut.
Spread batter in one well-greased 8-by 5-inch loaf pan. Bake at 350 degrees for 1 hour. Cool in pan for 10 minutes, remove, and cool further on wire racks.