Wash the mushrooms and eggplant thoroughly and cut them into bite-sized pieces.
Cut the beef into easy-to-eat pieces.
Heat cooking oil in a pan and stir-fry the beef first.
When the beef is partially cooked, add the mushrooms and eggplant and stir-fry together.
Season with soy sauce, sugar, minced garlic, and pepper.
When all ingredients are cooked, serve over rice.
Optionally, garnish with parsley or sesame seeds to finish.