Mash the banana in a medium bowl. Add the egg and milk. Whisk until frothy.
In a smaller bowl, add the flour, baking soda, baking powder and nutmeg. Sift into the banana mixture. Mix until just blended.
Pour batter in a non-stick skillet or griddle over medium heat sprayed with non-stick cooking spray. Cook about 1-2 minutes a side, small bubbles will form but not as many as traditional pancakes. I just peaked underneath for a light brown color, then flipped.