
Prepare the ingredients. Cut the chicken into bite-size pieces and clean the squid or octopus, if using. Lightly crush the galangal, lemongrass, garlic, and bird's eye chilies. Slice the onion, cut the tomato into wedges, and juice the lemon.



Place the chicken in a large pot. Add the onion, galangal, lemongrass, lime leaves, and garlic, then pour in enough water to fully cover the chicken. Cover the pot and bring to a boil over medium heat.


Once the broth is boiling, stir in the tom yum paste, bird's eye chilies, and tomato. Season with sugar and a pinch of chicken bouillon or salt. Reduce the heat to medium-low and simmer for 3 to 5 minutes so the flavors can infuse.



Add the squid or octopus, if using, and pour in the evaporated milk. Simmer gently for about 3 minutes, or until the seafood is just cooked through and the soup turns creamy.



Turn off the heat and stir in 2 tbsp lemon juice. Taste and add more lemon juice or salt if needed. Garnish with chopped cilantro or coriander and serve hot.

