Grilled Marinated Eggplant

Finely chop the parsley with the capers and garlic. Add the oregano and peperoncini and chop everything together. Put the mixture in a bowl, stir in the oil, season with salt and pepper, and reserve. Preheat an outdoor charcoal or gas grill or a grill pan until smoking hot. Put enough eggplant slices on the grill to cover it without crowding. Cook the eggplant until well marked, 3 to 6 minutes, then turn the slices over. Cook until tender, about 3 minutes more. Remove the eggplant from the grill. Pour the vinegar into a shallow bowl. While still hot, dip each eggplant slice into the vinegar and set it aside on a plate. Continue grilling and dipping the eggplant until all the slices are cooked and seasoned. Spoon 2 tablespoons of the parsley mixture onto a platter and spread it evenly with the back of a spoon. Arrange half of the grilled eggplant on the parsley in a single layer. Smear each slice of eggplant with more parsley. Place a second layer of eggplant on top and spread the remaining parsley on it. Cover the dish with plastic wrap and set aside to marinate at room temperature for about 2 hours (or refrigerate for longer). Serve at room temperature.