In a small bowl, combine the ground flaxseed and water. This is your flax egg.
In a large bowl, whisk together the pumpkin, brown sugar, canola oil, flax egg and soy milk until smooth.
Add the flour, sprinkle the baking soda, baking powder, salt, cinnamon, nutmeg and cloves on top of the flour. Stir with a large spoon or spatula, gently, until just combined. Do not over mix.
Pour into the prepared pan. Bake for about 1 hour and 15 minutes, until a toothpick inserted in the center comes out clean.
Let it cool in the pan for 10-15 minutes, then transfer the loaf to a cooling rack. Slice carefully right away, or let cool completely for easier slicing and serving.