Place the frozen acai puree and sliced frozen banana into a high-powered blender.
Pour in 50 ml oat milk, adding a splash more if needed for blending.
Blend on high until smooth and thick, scraping down the sides as necessary.
Spoon the acai mixture into a bowl.
Top with granola, fresh blueberries, sliced strawberries, and a drizzle of honey or maple syrup.