Put the wok on the stove and add alternately pork, chicken, sausage and white wine. Cover with the lid and stew 20 minutes, stirring occasionally. Take out the meat from the pan with a slotted spoon. Put the olive oil in a pan and add the chopped alternately striped eggplant, red, green, yellow pepper, zucchini, salt and pepper. Stew for 20 minutes and add the meat and leeks, cut into rings. Stew everything together for 5 minutes.