Cut the pork loin and eggplant into bite-sized pieces.
Mince the green onion and garlic.
Heat cooking oil in a pan and stir-fry the green onion and garlic until fragrant.
Add the pork loin and stir-fry until the surface is cooked.
Add the eggplant and continue to stir-fry together.
Add soy sauce, sugar, and red pepper powder, and stir-fry until the flavors are absorbed.
Season with black pepper to taste.
Transfer to a plate to serve.