Preheat oven to 350 F, grease and flour a 9x13 baking pan
In a large bowl, stir together the flour, sugar, baking powder, cinnamon, baking soda, salt, and nutmeg; set aside
2 1/4 cups flour, 1 1/4 cups sugar, 2 tsp baking powder, 2 tsp cinnamon, 1 tsp baking soda, 1/2 tsp salt, 1/4 tsp nutmeg
In a separate bowl, stir together the oil, eggs, tomato soup, and vanilla until smooth
3/4 cup canola oil, 3 large eggs, 1 10.75 oz can condensed tomato soup, 1 tsp vanilla extract
Pour the oil mixture into the flour mixture and stir until the flour is just moistened
Spread the cake batter evenly in the prepared baking pan, bake in preheated oven for 30 minutes, or until a toothpick inserted through the center comes out clean
Allow to cool completely before frosting