1: Preheat the oven to 350°F (175°C).
2: In a bowl, mix the pumpkin puree, egg whites, sweetener, vanilla extract, and milk until well combined.
3: In another bowl, mix the oat flour, baking powder, baking soda, and spices (cinnamon, ginger, nutmeg, cloves, and pinch of salt).
4: Combine the dry ingredients with the wet mixture and stir until fully incorporated.
5: Pour the batter into a loaf pan and top with walnuts if desired.
6: Bake for approximately 45 minutes or until a toothpick inserted comes out clean.
