Pre heat oven to 350° F.
In a mixer, beat the eggs sugar and oil. Add the pumpkin and beat until smooth, add the baking powder, baking soda, flour and spices.
Pour batter into a greased 10 inchX15 inch jelly roll pan. Bake for 25 to 30 minutes, or until a toothpick comes out clean when inserted.
Cool and frost. Cut into 2 inchX7 1/2 inch bars and serve.
Garnish each piece with orange rind curls.