Look for small types of eggplant, such as Turkish or Italian. Tabbouleh is a Middle Eastern salad made with bulghur wheat, tomatoes, mint, parsley, and olive oil.
Place bulghur wheat in a medium heatproof bowl, and pour the boiling water over; let stand until softened, about 45 minutes. Drain well in a fine sieve; return bulghur to bowl, discarding liquid. Add tomatoes, scallions, parsley, and mint; stir well to combine.
In a small bowl, whisk together lime juice and 4 tablespoons oil; season with salt and pepper. Pour over bulghur mixture, and stir to combine. Let stand at room temperature 30 minutes.
Meanwhile, heat grill to medium. Halve eggplants crosswise; brush with remaining 3 tablespoons oil. Season with salt and pepper. Grill until eggplant softens, about 10 minutes, depending on heat of grill. If eggplant begins to char on the outside before inside is soft, cover with foil. Transfer to a serving platter.
Season bulghur salad with salt and pepper; spoon over bottom halves. Replace top halves over salad, and serve.