Preheat oven to 350 degrees
Combine flour, baking soda, baking powder, cinnamon, salt, nutmeg, cloves in a medium bowl. Mix well. Set aside.
In another bowl, whisk egg whites and beat until smooth and fluffy. Combine sugar and yogurt, beat some more.
Add the pumpkin puree to egg white mix and stir with rubber spatula.
To this pumpkin mixture, add dry ingredients mix and stir until fully combined.
Pour the batter into the greased pan and bake for 55 - 60 minutes or until the inserted toothpick comes out clean.
Let it cool on cooling rack.
Add cream cheese frosting or topping of your choice. Serve it with coffee.