Preheat the oven to 350 F. Lightly coat 6 individual oven-proof ramekins or souffle dishes with cooking spray.
In a medium bowl, add the raspberries, blueberries, apples, sugar, cinnamon, lemon zest and lemon juice. Stir to mix evenly. Add the cornstarch and stir until the cornstarch dissolves. Set aside.
In a separate bowl add the egg white and whisk until lightly beaten. Add the soy milk, salt, vanilla, sugar and pastry flour. Stir to mix well.
Divide the berry mixture evenly among the prepared dishes. Pour the topping over each. Arrange the ramekins on a large baking pan and place in oven.
Bake until the berries are tender and the topping is golden brown, about 30 minutes. Serve warm.