Banana Pecan Waffles

1 cup flour
1/2 T sugar
1 tsp baking powder
1/4 tsp baking soda
1/4 tsp salt
1/2 cup chopped pecans
1 egg, separated - beat egg yolk and whip white.
1 cup sour cream
1/4 cup milk
1/4 cup butter
1 banana, mashed

Sift together dry ingredients and set aside.
Mix together beaten egg yolk, sour cream, milk, butter, and banana.
Add to flour mixture, mixing well.
Fold in whipped egg white and pour into waffle iron.