COOKING INSTRUCTIONS Cut the top off the lemongrass, remove the tough outer layers and cut into 4 pieces.
Heat chicken broth, lemongrass, shallot, garlic, salt, kaffir lime leaves, ginger and 2 tbsp/30 ml fish sauce in a heavy stockpot over medium-low heat.
Bring to a light simmer, cover and cook for 30 minutes.
Strain broth through a mesh sieve, discard solids and return broth back to the stockpot.
Add the chicken, Thai peppers, bell pepper and zucchini.
Simmer for 15 minutes.
Add the shitake mushrooms and simmer for another 10 minutes.
Turn off the heat.
Add the basil, lime juice and additional tablespoon of fish sauce.
Adjust seasoning to taste.