Heat 2 tablespoons of oil in a pot.
Add in onions, lemon grass, garlic, ginger, chillies, kaffir lime leaves and saute for 10 minutes.
Mix in chicken chunks and cook for another 5 minutes.
Add mushrooms and pour in chicken stock. Reduce heat to low and simmer for 10 minutes.
Stir in fish sauce, salt, brown sugar and coconut milk.
Add in snow peas/sugar snaps and simmer for 5 minutes.
Finally add in the lime juice, lime zest and chopped coriander.
Serve in bowls and top with lime wedges and more chopped cilantro