
Silky steamed eggplant soaks up a bold sauce of soy, black vinegar, sesame oil, and spicy Lao Gan Ma chili crisp. A final splash of hot oil blooms the garlic and scallions, turning a simple vegetable dish into a fragrant Chinese-style appetizer or side.
Set up a steamer with enough water to simmer steadily without touching the dish. Start heating it over low heat while you prepare the eggplant.
Trim the eggplants, then cut them crosswise into 3 sections. Slice each section lengthwise into 8 to 10 bite-size strips.
Combine about 2 quarts of water with the white vinegar in a large bowl. Soak the eggplant for 3 minutes, then drain and gently squeeze out excess liquid. Arrange the pieces on a heatproof rimmed plate.
Place the plate in the steamer, cover, and increase the heat to high. Steam for 8 to 10 minutes, until the eggplant is very tender but still holds its shape.
While the eggplant steams, stir together the Chinese black vinegar, light soy sauce, oyster sauce, sugar, sesame oil, and Lao Gan Ma chili sauce until the sugar dissolves.
Carefully remove the plate from the steamer, keeping the cooking juices on the plate. Spoon the sauce evenly over the eggplant, then scatter the minced garlic and sliced scallion in narrow lines over the top.
Heat the vegetable oil in a small saucepan until shimmering and just beginning to smoke. Carefully pour the hot oil over the garlic and scallion to release their aroma. Serve warm, room temperature, or chilled.
Chinese or Japanese eggplants work best because they have thin skin and a tender texture. The vinegar soak helps keep the eggplant brighter and reduces bitterness, but do not soak it too long or it can absorb excess water. For a vegetarian version, replace the oyster sauce with vegetarian oyster sauce or a little extra soy sauce plus a pinch of sugar. This dish can be made ahead and served chilled; refrigerate for up to 2 days.