Preheat the oven to 176°C. Grease one 425x295x75 mm rectangular baking pan and line the bottom with parchment paper then grease the top of the paper. Alternatively, you can grease and flour the bottom and sides of both pans which I did.
In a medium sized bowl, whisk flour, baking soda, salt, nutmeg and the cinnamon until well combined.
In a large bowl, whisk the oil, white and brown sugar, and vanilla. Whisk in eggs, one at a time until just combined.
Add the dry ingredients slowly, gently stirring until lumps disappear and the batter is smooth. Stir in the carrots, nuts, dessicated coconnutand raisins., mix until well combined.
Spread the batter on the prepared rectangular baking pan (1). Bake for about 30-40 minutes until the top of the cake is springy when touched and when a toothpick inserted into the center of the cake comes out clean.
Cool cake before frosting.