Preheat oven to 350 degrees F. Mist a 9x9-inch baking dish with nonstick cooking spray and set aside.
In a large bowl, whisk together the coconut, walnuts, chia seeds, cinnamon, baking powder, and salt until well-combined. Set aside. In a medium bowl, mash the banana against the sides of the bowl using the backside of a fork. Add the eggs, milk, and coconut oil; whisk until well-combined.
Pour the wet ingredients into the dry and mix until just combined. Gently fold in the diced strawberries and pour into the prepared baking dish.
Bake for 40-50 minutes or until edges are golden and breakfast bake is fully set. Serve warm.