Preheat oven to 350 F. Generously spray a 10x15 in jelly roll pan with cooking spray, line with parchment paper. Spray paper with cooking spray and lightly flour it. Set a side.
Beat eggs on high for 3 minutes. Add sugar and beat for 3-4 minutes, on high until pale and frothy. Add vanilla extract and oil, mix to combine.
In a separate bowl combine flour, salt, baking powder, ginger, nutmeg and cinnamon. Stir dry ingredients into wet ingredients, until just combined, Do not over mix. Stir in carrots.
Transfer mixture into prepared pan, spread it using a spatula. Bake for 15-16 minutes until done, but still soft.
While carrot cake is baking, line a clean kitchen towel and sprinkle a generous amount of powdered sugar over it.
When cake is finished baking, take it out of the oven and quickly turn it over the kitchen towel, sprinkled with powdered sugar.
Starting at the short end, roll the cake with the towel. Let it cool completely for a few hours.