Step 1

Cut eggplants into quarters lengthwise, then into 2-inch pieces. Heat 2 tablespoons oil in a large cast-iron skillet over high heat. Add half of the eggplant and cook, stirring occasionally, until tender and browned in parts, 4 to 5 minutes. Transfer to a large bowl. Repeat with 2 tablespoons oil and the remaining eggplant. Cover the eggplant to keep warm and set aside.

Step 2

Meanwhile, whisk hoisin, soy sauce and plum sauce in a small bowl. Set aside.

Step 3

Heat the remaining 1 tablespoon oil in the skillet over high heat. Add jalapeños and onion; cook, stirring often, until slightly softened, 4 to 5 minutes. Add garlic and ginger; cook, stirring often, until softened and fragrant, 30 seconds to 1 minute. Add the onion mixture and basil to the eggplant and stir in the sauce. Serve immediately.