Step 1: 1. Place chicken breasts and stock in to a stockpot or casserole. Bring to the boil and let simmer for about 20 minutes, or until chicken is cooked through. Remove the chicken from the stock and set aside.
Step 3: 2. Put the leeks and carrots into the pot and simmer them for 10 minutes, or until tender.
Step 5: 3. Shred the cooled chicken and return to the pot. Add the cabbage and egg noodles and cook another 5 minutes or until the noodles are soft. The soup should be thick like a stew. Serve hot and flavour to taste with Thai chilli sauce.