If you want to make this Chinese Chicken on a Stick recipe vegetarian, then you could use a few vegetables. Portabella mushroom slices work great because they are thick and meaty and easy to skewer. You could also use zucchini spears. Try finding 8 inch long zucchinis. Then cut the zucchini in half lengthwise, then each half in half again, giving you four 6-8-inch spears. Then cut the 4 spears in half so you have eight 3-4-inch spears, then gently skewer them. You could also use extra firm tofu by slicing 3-4-inch long pieces.