Prick sweet potato all over with a fork. Microwave on high in 2-minute intervals until tender, turning halfway through, 8 to 10 minutes. Cool sweet potato until easily handled, about 10 minutes.
Peel sweet potato and mash coarsely with a fork. Measure out 2 tablespoons and place in a blender. Add banana, Greek yogurt, orange juice, and strawberries; blend until smooth.
