Pre-heat oven to 350 degrees F. Line your loaf pan with parchment paper.
In a large bowl, combine flour, baking soda, baking powder, salt, cinnamon and pumpkin spice.
In a medium bowl, beat the eggs with a whisk and combine with brown sugar, oil and milk until all the same colour. Stir in pumpkin and lemon zest. Add this bowl of wet ingredients to the dry ingredients. Stir until just combined and you don't see flour in the batter.
Add the batter into the loaf pan. Sprinkle the top with the pumpkin seeds.
Bake in the preheated oven for 50 minutes or until a toothpick inserted in the centre comes out clean.
Cool for about 10 minutes in the pan then take out and slice warm.