Cut the eggplant and onion into bite-sized pieces.
Heat cooking oil in a pan and sauté the onions.
When the onions turn translucent, add the eggplant and sauté together.
Once the eggplant softens, add soy sauce, sugar, and minced garlic. Stir-fry everything together.
Season with pepper to taste.
Spoon the stir-fried eggplant mixture over rice.
Garnish with chopped green onions and sesame seeds.