Authentic Thai Tom Yam Soup Recipe

Name: Authentic Thai Tom Yam Soup Recipe
Ingredients: 4-10 crushed hot red chillies; 1 cup sliced mushrooms; 2 stalks lemongrass (sliced into 3cm long pieces); 1/2 cup sliced onion; 1/2 cup sliced galangal; 1/2 cup sliced tomatoes; 6 kaffir lime leaves; 4 tsp. lime juice; 4 tbsp. fish sauce; 1 tsp. sugar; 1 tbsp. shrimp paste; 1 litre of water; 10 shrimps/prawns (take heads off and keep); 2 tbsp. of chopped spring onion; 1/2 tsp. salt; 2 stems of fresh coriander; 4 stems of fresh parsley