Pour soy sauce, oil, honey, vinegar, ginger and garlic powder into a large plastic bag. Put the chopped meat in this marinade, close the bag and shake well. Put the meat bag in the refrigerator overnight (at least 8 hours).
Turn on the grill to preheat to medium heat. Remove the meat from the marinade. On 12 metal skewers, string meat, mushrooms, onions, bell peppers and zucchini in turn.
Place the beef kebabs with vegetables on the grill and cook, turning occasionally for 12-14 minutes.