1. Cut slits in each eggplant. Roast over gas burner until smoked and blackened, or broil, turning to cook evenly. Roast tomatoin the same manner.
2. Peel eggplants and chop. Peel tomato and chop. Place eggplants and tomato in a bowl and mash together. Add onions, chiles, cilantro, lime juice, mustard oil and salt and stir to mix.