1. Prepare a blender. Add egg whites and stevia in the blender and blend on low to mix well for 1 minute. Then, increase speed to high until stiff peaks have formed. Transfer contents into a mixing bowl.

2. Add banana and raspberry into the same blender and blend on medium until the colour is uniform. Fold blended banana and raspberry into egg white mix bit by bit to make into a mousse.

3. In a glass cup, fill the base with a mix of strawberries and blueberries. Top with mousse and serve immediately.