Preheat oven to 350 degrees.
Cut orange into pieces. Remove seeds.
Put in blender with boiling water. Blend until smooth. Add egg and oil. Blend a few minutes more.
Combine remaining ingredients in a bowl and stir well.
Add liquid from blender to the dry ingredients. Stir until just blended.
Pour into greased 9-inch by 5-inch by 3-inch loaf pan or into 3 mini loaf pans. Bake about 50 minutes. Unmold on cake rack.