In a blender, combine the frozen banana, mixed berries, spinach or kale, and almond milk or coconut water.
Blend until smooth and creamy, adding more liquid if needed to reach your desired consistency.
Pour the smoothie base into a bowl.
Top with sliced fresh fruits, granola or muesli, chia seeds, basil seeds, or flaxseeds, and coconut flakes or shaved almonds.
Drizzle with honey or maple syrup for added sweetness if desired.
Serve the smoothie bowl immediately and enjoy a refreshing and nutritious breakfast to start your day on the right note!