Cut the sweet potato into sticks. Soak in water and drain.
Cut the pork into sticks, season with salt and pepper and dredge in flour.
Shallow-fry the sweet potato and pork until crispy.
For the sauce, mix the water, sugar, soy sauce and potato starch in a large pan on low heat.
After the glaze gets syrupy, add the fried pork and potatoes and dress with black sesame.