Ingredients

• ½ cup matzo meal
• ⅓ cup walnuts
• 2 large eggs
• 1 ¼ cups sugar, divided
• 2 teaspoons vanilla extract
• 1 cup grated peeled apple, preferably delicious
• 2 tablespoons unsweetened cocoa powder
• 2 ounces bittersweet or semisweet chocolate, chopped
• 8 large egg whites, at room temperature
• ½ teaspoon salt
• confectioners' sugar, for dusting