Blend together egg whites, pumpkin, cinnamon, milk, Stevia, and vanilla until smooth. Set aside. In a separate bowl, combine flours, baking powder, collagen, and salt. Stir into wet ingredients just until moistened. Heat a non-stick skillet over medium heat. Using 1/3 cups of batter for each pancake, frying until bubbles appear. Flip pancakes and fry on other side. 12 pancakes.