Preheat your oven to 350°F (175°C) and lightly grease a small oven-safe baking dish with a touch of coconut oil or avocado oil.
In a medium mixing bowl, whisk together the liquid egg whites, non-fat Greek yogurt, almond butter, maple syrup, and vanilla extract until the mixture is smooth and well-combined.
Add the rolled oats, hemp seeds, ground cinnamon, baking powder, and sea salt to the wet ingredients, stirring until the oats are fully submerged.
Gently fold in half of the mixed berries, then pour the entire mixture into the prepared baking dish.
Scatter the remaining mixed berries over the top of the oats for a vibrant finish.
Bake for 25 to 30 minutes, or until the center is firm to the touch and the edges are slightly golden brown.
Remove from the oven and let it sit for 5 minutes to set before serving warm.