This recipe may be customized by using only oat flour or regular white flour.  Anything conventional goes!  If the recipe is halved, then it would be a good idea to scramble the egg in a small bowl and pour in only half of it instead of using only egg whites or egg yolk.  This is Gluten-Free and it can be easily altered to be an all-purpose recipe with the simple substitution of regular flours.  Give this a try and I hope you like it!  The recipe is found in the link.