Chocolate Buckwheat Waffles with Juicy Berries

Combine strawberries and 2 tablespoons sugar, tossing well. Let stand at room temperature 30 minutes. Place yogurt, 1 tablespoon sugar, and 1/4 teaspoon vanilla in a small bowl, stirring well; chill until ready to serve. Weigh or lightly spoon flour into a dry measuring cup; level with a knife. Combine flour, cocoa, baking soda, and salt in a large bowl, stirring with a whisk. Combine remaining 1/2 teaspoon vanilla, buttermilk, and next 3 ingredients (through yolks) in a medium bowl, stirring with a whisk. Add buttermilk mixture to flour mixture; stir well. Preheat a Belgian waffle iron. Place egg whites in a large bowl; beat with a mixer at high speed until foamy. Gradually add remaining 6 tablespoons sugar, 1 tablespoon at a time, beating until stiff, glossy peaks form. Gently fold about one-fourth of egg white mixture into batter. Fold in remaining egg white mixture. Coat waffle iron with cooking spray. Spoon about 1/2 cup batter over each waffle plate, spreading to edges. Cook 4 minutes or until lightly browned and done; remove waffles from iron. Repeat procedure with cooking spray and remaining batter. Top waffles with strawberry mixture, yogurt mixture, and almonds.