Add the whole lemon, eggs, sugar and oil to a blender or food processor and blend on high till it's liquified (no lumps or pieces)
In a separate mixing bowl add the flour, baking powder and pinch salt. Pour the liquid mixture into the flour, mix well.
It goes into a 8inch greased baking pan (you can use round if that's what you have) , flatten it as much as possible to even it out, bake at 350*F for 40-45 min (check with toothpick to insure it's ready) and let it cool completely before adding powdered sugar or glaze.
