Whole Grain Waffles with Strawberries and Almonds

Name: Whole-Grain Waffles with Strawberries and Almonds
Ingredients: 1/2 cup rolled oats; 1/2 cup whole-wheat flour; 1 tablespoon ground flaxseed; 2 teaspoons baking powder; 1/4 teaspoon pumpkin pie spice; 1/4 teaspoon salt; 1 egg, separated; 3/4 cup skim milk; 1/4 cup mashed banana; 1 tablespoon canola oil; Vegetable oil cooking spray; 3/4 cup nonfat plain Greek yogurt, divided; 1 1/2 cups sliced strawberries, divided; 3 tablespoons sliced almonds, divided; 6 teaspoons maple syrup, divided