Waffles

Name: Waffles
Ingredients: 1 3/4 cups all-purpose flour; 1 3/4 teaspoons baking powder; 1/8 teaspoon fine salt; 1/8 teaspoon ground nutmeg; 1 1/2 cups milk, at room temperature; 2 large eggs, at room temperature, separated; 1/2 teaspoon vanilla extract; 1/4 cup unsalted butter, melted, plus more for brushing the iron; 1 large egg white, at room temperature; 1/4 cup sugar; Serving suggestions: Maple syrup, jam, fresh fruit, or yogurt