Apple-berry cobbler - Mayo Clinic

Ingredients

• For the filling:
• 1 cup fresh raspberries
• 1 cup fresh blueberries
• 2 cups chopped apples
• 2 tablespoons turbinado or brown sugar
• 1/2 teaspoon ground cinnamon
• 1 teaspoon lemon zest
• 2 teaspoons lemon juice
• 1 1/2 tablespoons cornstarch
• For the topping:
• Egg white from 1 large egg
• 1/4 cup soy milk
• 1/4 teaspoon salt
• 1/2 teaspoon vanilla
• 1 1/2 tablespoons turbinado or brown sugar
• 3/4 cup whole-wheat pastry flour