Mix together the cornmeal, whole-wheat flour and white flour. Blend in the skim milk and allow the batter to stand for 5 minutes.
Whip the egg whites until they stand in peaks. Then fold them into the batter.
Spoon the batter onto a preheated non-stick skillet and cook until bubbles form on the pancake or the edges turn brown, then flip the pancake over and cook for 1 minute more.
