01 - Lightly sprinkle the eggplant batons with salt and allow them to rest for 10 minutes to extract excess moisture. Rinse thoroughly and pat dry with paper towels.
02 - Heat 3 tablespoons vegetable oil in a wok or large skillet over medium-high heat. Fry eggplant until golden and tender, approximately 6 to 8 minutes. Transfer to paper towels to drain.
03 - Remove excess oil from the pan, leaving approximately 1 tablespoon. Add ginger, garlic, and red chili; stir-fry for 1 minute until aromatic.
04 - Incorporate doubanjiang and sauté for another minute, stirring constantly until oil develops a vibrant red hue and emits a fragrant aroma.
05 - Return the fried eggplants to the pan. Add soy sauce, dark soy sauce, rice vinegar, sugar, and vegetable stock. Gently stir to coat the eggplants evenly.
06 - Reduce heat to low, cover, and simmer for 8 to 10 minutes until eggplants are exceptionally tender and flavors blend.
07 - Combine cornstarch and water to form a slurry. Pour into the pan and cook for 30 seconds, stirring until the sauce thickens.
08 - Drizzle with sesame oil and garnish with sliced spring onions prior to serving.