Place the frozen strawberries, frozen banana slices, Greek yogurt, and almond milk into a high-speed blender.
Process on low speed, using a tamper to push the frozen ingredients down toward the blades.
Increase speed gradually and blend for 45-60 seconds until the mixture reaches a thick, soft-serve consistency.
Transfer the smoothie base into a chilled bowl and smooth the surface with a spoon.
Arrange the granola, fresh strawberry slices, and fresh banana slices in rows on top of the base.
Garnish with a sprinkle of chia seeds and serve immediately while frozen.