Wildly Frugal Orange Cake

Yesterday, I came across the wildest orange cake recipe ever. Stumbled across it on Conscious Earth, who got the recipe from Down to Earth, who got the recipe from HERE.
   This recipe was not only incredibly easy to make but also is wildly frugal in that it uses the WHOLE orange. Gotta love that! My version is a slight adaptation of down-to-earth's.
   The organic orange I used was whopping big, so my "cake" really seems more like a slightly sweet, ultra moist perfect-for-breakfast bread. Slightly bitter orange, like imported orange marmalades. Like down-to-earth, I skipped the sugar glaze on top, but most *American sweet tooths will be happier with removing at least half of the pith (zest then remove half of the rind) and using the glaze.
Wildly Frugal Orange Cake
1 whole seedless *orange, skin and all (VERY well washed if not organic)
1½ cups melted butter
3 eggs
1 cup sugar
1½ cups all purpose flour
2 tsp. baking powder
1/2 tsp. salt
In a small bowl, sift or whisk the dry ingredients together until fully combined. Process the whole orange in a food processor until well pureed. Add all other ingredients and process until well mixed. Pour into a greased and floured 8 1/2" x 4 1/2" x 2 1/2" loaf pan. Bake 40-45 minutes in a preheated 350°F oven, until toothpick tests clean.
Optional Sugar Glaze
2½ cups confectioner's sugar
2 tablespoons melted butter
Orange juice and zest
Mix sugar, butter, zest and just enough orange juice together for a slightly runny consistency. Pour onto cooled cake, letting it run down the sides.
   Sorry I did not manage to get a better pic of the final product!
   A recipe that wastes little to nothing of a beautiful orange and makes the house smell great to boot! What will they think of next?!