Pre-heat waffle iron according to manufacturer's directions and spray with nonstick cooking spray.
In the bowl of a stand mixer with the whisk attachment, or using an electric mixer, beat the egg whites until stiff peaks form.
In a medium bowl, add oat flour, flaxseeds, protein powder, baking powder, vanilla, and almond and mix to combine. Add the egg whites and gently fold to incorporate.
Scoop by 1/2 cupful onto hot waffle iron and cook according to manufacturer's directions, until golden brown and crisp.
Serve immediately with your favorite topping.
*Oat flour can be made by grinding an equal amount of regular uncooked oatmeal in a blender or food processor until it forms a powder.**To keep waffles crispy in between cooking, place on wire baking rack to cool.Adapted from the FIXATE cookbook