Arrange 3 slices lengthwise overlapping each other, spread a heaping spoonful of eggplant mixture on top of zucchini slices, roll the zucchini around the mixture to make a roll, repeat with zucchini and eggplant filling. use 3 bowls. one for flour, eggs, and panko bread crumbs. dip roll in flour, then eggs, and panko crumbs.