Wash oranges
Boil them in plenty of water for 2 hours or until tender
Remove from pot and cut away the top and bottom stem
Cut orange in 4 and place the pieces in a food processor or blender until pureed. Do not remove the skin, it gives the cake plenty of flavor and color
Meanwhile, sift the Almond Meal
Preheat oven to 375 Degrees F.
Butter or oil a 9 Inch springform pan
Place the eggs and sugar in a bowl
Using the mixer, mix on medium heat for 3-5 minutes or until the egg's volume has increased
Add the orange puree and continue mixing
Add the salt, baking powder and mix
Finally, add the almond and mix until combined
Place the batter on the prepared pan
Sprinkle the slivered almonds on top (optional)
Bake for 24-28 minutes or until the top has browned and a knife inserted in the middle comes out clean
Let the cake cool on a baking rack for 30 minutes
Run a knife through the pan and the edges of the cake
Remove the sides of the cake mold
Sprinkle powdered on top
Enjoy!