Waffles with Fresh Strawberry Syrup

Name: Waffles with Fresh Strawberry Syrup
Ingredients: 2 cups all-purpose flour; 2 teaspoons baking powder; 1/2 teaspoon salt; 4 large eggs, separated; 2 tablespoons sugar; 2 cups whole milk; 4 tablespoons (1/2 stick) unsalted butter, melted; 1/2 teaspoon vanilla extract; Nonstick cooking spray, optional; Strawberry Syrup, recipe follows; 1 pound fresh strawberries, hulled and diced, or thawed frozen unsweetened strawberries (about 3 cups); 1 cup sugar; 3 tablespoons fresh orange juice; 1/2 teaspoon finely grated orange zest