Chop apples and add them to a baking dish along with the frozen summer berries.
In a separate bowl, mix the oats, whey protein, eggs, peanut butter, honey, salt, and cinnamon together to form the crumble topping, then spread it evenly over the fruit.
Bake at 180°C for roughly 25 to 30 minutes until golden and bubbling.
Divide evenly into the original 6 portions and serve!
