Peel shrimps and set aside

Put shells in large pan

Bruise lemon grass and add it to the pan along with stock, ginger and lime leaves, bring to boil and simmer for 20 mins

Strain into another pan/pot, discard shells, lime leaves and ginger

Add in fish sauce, lime juice, garlic, green onions, chili and mushrooms into the stock and bring to boil and simmer for 5 minutes

Add peeled shrimps to the broth and cook for another 3 mins

Serve immediately, garnished with cilantro

Enjoy :)