Ingredients: 1 large eggplant, peeled and cut into 1/2-inch slices 1 large sweet onion, peeled and halved 1 red bell pepper, halved and seeded 1 green bell pepper, halved and seeded 1 small zucchini, cut into 1/2-inch slices 8 fresh tomatoes, chopped 0.25 cup balsamic vinegar 0.25 cup olive oil 12 fresh basil leaves salt