Wash and peel the eggplants in stripes. Cut to cubes. Soak them in salted water for about 20 minutes to get rid of the black water. Drain, wash and tap out with clean kitchen towel to dry.
Peel the potatoes, cut to cubes and wash them with plenty of water and dry them up with paper towel.
Peel the zuchinis, cut to cubes.
Try to make all the vegetables be about the same size. It will look better on the plates and one vegetable will not be overruling the others like this.
Cut the peppers into two and take out the seeds and this time cut to two dimentional cubes.
Fry the vegetables in heated olive oil at medium heat. First the potatoes, then the zucchinis, then the eggplants and finally the peppers separetly. After taking out each party keep them on paper towels to soak up the excess oil. For the potatoes sprinkle some salt to keep them crispy.