How to make radish vermicelli, egg stuffing and cake stuffing? Chop the kohlrabi and marinate it with salt for a while. Soak the vermicelli in hot water, and then chop it. Fry the eggs and chop them. Then put the kohlrabi in a pot and add some water to dry. Add vermicelli eggs. Add onion, ginger and thirteen spices. Salt seasoning oil. Stir well.