01 - Toss eggplant batons with a light sprinkling of salt. Let stand for 10 minutes to extract excess moisture, then rinse and pat thoroughly dry with paper towels.
02 - Heat 3 tablespoons vegetable oil in a wok or large skillet over medium-high heat. Fry eggplant pieces until golden brown and soft, approximately 6 to 8 minutes. Remove with a slotted spoon and drain on paper towels.
03 - Wipe excess oil from the pan, leaving about 1 tablespoon. Add ginger, garlic, and sliced chili. Stir-fry for 1 minute until highly fragrant.
04 - Incorporate doubanjiang. Cook, stirring constantly, for 1 minute until the oil turns a rich red and the paste becomes deeply aromatic.
05 - Return eggplant to the pan. Add light soy sauce, dark soy sauce, rice vinegar, sugar, and vegetable stock. Stir gently to evenly coat, then cover and simmer over low heat for 8 to 10 minutes until exceedingly tender.
06 - Combine cornstarch with 2 tablespoons water to form a slurry. Pour the slurry into the pan and stir for 30 seconds until the sauce achieves a luxuriant, glossy consistency.
07 - Drizzle in sesame oil. Garnish with spring onions and serve immediately alongside steamed rice.