1. Cut tomato in wedges. Slice onion, then chop half of onion. Shred garlic and green onion. Cut red chili in strips and chop ⅓ of kimchi. Put onion and kimchi into minced pork. Stir with egg and put in cornstarch.
2. Heat the oil in pot, stir fry onion, garlic, red chili, kimchi and tomato. Put in chicken broth. Cover the lid and cook in mid-low heat for 15 minutes. Turn to low heat when soup boils.
3. Make meatballs with two spoons and then put in soup. Cover the lid and cook in mid-heat for 5 minutes. Season with salt and sugar. Put in green onion.