Belgian Waffles

Prep: 15 min, Cook: 5 min, plus rising time. Sprinkle yeast over warm milk in a large mixing bowl. Stir in sugar and set aside 5 minutes. Beat egg yolks and vanilla in a small bowl. Stir into yeast mixture. Sift flour and salt together in a bowl and stir into liquid ingredients. Stir in melted butter and mix thoroughly. Carefully fold in beaten egg whites. Cover loosely and set aside to let rise in a warm place about 45 minutes, until mixture doubles in volume. Preheat waffle iron. When hot, lightly brush waffle iron surface with oil. Pour 3/4 cup batter per waffle onto hot iron. Close and bake 4-5 minutes or until iron stops steaming. Open cover and use fork to remove waffle. Continue with remaining batter. Serve immediately with strawberries and desired toppings or keep warm in 200?F oven until ready to serve.