In a large bowl, add all dry ingredients (oats, protein, walnuts, cinnamon) and stir.
In a separate bowl, mash bananas and add egg whites and vanilla and stir.
Pour wet ingredients into the bowl with the dry ingredients and combine until evenly mixed.
Scoop mixture into a 9x9 Pyrex dish and bake at 350 degrees F for 15 minutes
Serving Size 9 bars