Blueberry Pancakes

2 eggs, separated
1 1/2 cups sifted all-purpose flour
2 1/4 teaspoons baking powder
3 tablespoons sugar
3/4 teaspoon salt
1 cup milk
3 tablespoons butter, melted
1 cup fresh or frozen thawed blueberries, rinsed well.

In a small bowl, beat egg whites until stiff; set aside.

In a separate bowl, sift together flour, baking powder, sugar and salt. Beat egg yolks in a medium mixing bowl; add milk and melted butter. Stir egg mixture into dry ingredients; mix until batter is smooth and then gently stir in blueberries. Cook over medium low heat in skillet til each pancake is golden brown.