Preheat oven to 350F
Prepare a 10x15 jelly roll pan with shortening and flour or a cooking spray
Line pan with parchment paper, spray paper with cooking spray
Beat eggs with a mixer on high for 3 minutes
Add sugar and beat an additional 3 - 4 minutes until pale and frothy
Add vanilla and oil, mix to combine
In a separate bowl, sift flour, salt, baking powder, ginger, nutmeg, and cinnamon
Add wet ingredients and combine. Do not overmix.
Stir in carrots
Pour mixture onto prepared pan
Spread with a spatula
Bake approximately 15 minutes, making sure it is still soft
While cake is baking, take a clean kitchen towel and sprinkle it generously with powdered sugar
As soon as the cake is finished baking, take it out of the oven and quickly turn it over onto the kitchen towel
Beginning at the short end of the cake, roll with the towel.
Allow to cool for a few hours. This will help it to keep its shape.