Wash the meat, dab dry and dice, sprinkle with soy sauce and 1 tablespoon of oil. Cover and chill for about 1 hour.
Wash and clean the zucchini, tomatoes and eggplant and cut in half lengthwise. Peel and halve the onions. Cut the vegetable halves into 2-3 mm thin slices. Arrange vegetable slices alternately in 1-2 rows on a greased baking tray. Sprinkle with about 4 tbsp. oil, season with salt and pepper. Bake the vegetables in a preheated oven (electric cooker: 200 °C/ circulating air: 175 °C/ gas: see manufacturer) for approx. 30 minutes
Cut the ham into strips about 1.5 cm wide. Heat 1 tablespoon of oil in a frying pan. Fry the diced duck for 2-3 minutes and remove. Place the diced meat and ham alternately on the skewers. Place the skewers on the tray next to the vegetables approx. 5 minutes before the end of the cooking time
Wash the thyme, shake dry and pluck coarsely. Remove the tray from the oven, cover and leave to rest for 4-5 minutes. Arrange 2 skewers and vegetables on plates in portions. Sprinkle with thyme
Waiting time approx. 20 minutes