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1
Heat neutral oil in wok over high heat until smoking; working in batches, fry eggplant batons 3–4 minutes per batch until golden and tender, transfer to plate.
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2
Add 15 ml fresh oil to wok; bloom Sichuan peppercorns 30 seconds, then add fermented black beans, garlic, and ginger—stir constantly 1 minute.
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3
Add ground pork, breaking into small pieces with wok turner; cook 2–3 minutes until no pink remains.
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4
Return eggplant to wok; pour in black vinegar, soy sauce, and sesame oil; toss to coat evenly.
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5
Stir cornstarch slurry and pour into wok; toss continuously 1–2 minutes until sauce clings and gloss forms.
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6
Finish with sliced green onions and taste for balance of heat, acidity, and salt.