01 - Sprinkle the eggplant batons lightly with salt and let stand for 10 minutes to extract excess moisture. Rinse and pat dry thoroughly with paper towels.
02 - Heat 3 tablespoons vegetable oil in a wok or large skillet over medium-high heat. Fry eggplant until golden brown and tender, 6 to 8 minutes. Remove and drain on paper towels.
03 - Wipe excess oil from the pan, leaving about 1 tablespoon. Add ginger, garlic, and chili. Stir-fry for 1 minute, allowing flavors to blossom.
04 - Add doubanjiang, stirring for 1 minute or until the oil turns a rich red and the paste becomes aromatic.
05 - Return eggplant to the pan. Add soy sauce, dark soy sauce, rice vinegar, sugar, and vegetable stock. Gently fold to coat eggplant evenly.
06 - Cover and simmer over low heat for 8 to 10 minutes, allowing eggplant to become thoroughly tender and flavors to meld.
07 - Whisk cornstarch with water to form a slurry. Stir into the pan and cook for 30 seconds, until the sauce thickens and coats the vegetables.
08 - Drizzle with sesame oil and top with sliced scallions immediately before serving.