Preheat and grease a Belgian waffle iron as directed by the manufacturer. This can also be made in a regular waffle iron. Combine the flour, baking powder, confectioners' sugar, oil, milk, egg yolks, vanilla, and salt in a bowl and mix until just combined. In another bowl, beat the egg whites until soft peaks form. Gently fold the egg whites into the waffle batter until just barely mixed. Pour 1/2 cup of the waffle batter onto the hot waffle iron. Close the lid and cook for 2 minutes or until browned. Remove the waffle and keep warm. Repeat with the remaining waffle batter. Serve the waffles immediately, sprinkled with powdered sugar and topped with fruit and whipped cream, as desired. Recipe Source: Glynn House Inn, Ashland, NH