Thai Style Hot and Sour Soup Base

A spicy Thai style soup base that's full of flavour and very versatile.  The objective is to get a balance between hot, sour, sweet and salty flavours in the base.  It's endlessly variable - add vegetables (peas and green beans are very good,  chopped mushrooms also),  fish or shellfish (prawns are great), chicken or other meat,  noodles or any combination.

Ingredients for 8 portions
(basic soup can be frozen and additional ingredients added when thawed)

• 1 litre of stock (I use homemade chicken stock whenever possible)
• 1 400ml can coconut milk
• 1 large onion - peeled and chopped
• 4 carrots - peeled and chopped
• 1 Tbsp vegetable oil
• 1-2 tbsp red or green Thai curry paste (Mae Ploy is good - quantity depends on desired spiciness)
• 1-3 tbsp fish sauce (depending on saltiness of the stock. Use soy sauce instead for vegitarians)
• 1 tbsp sugar
• 2 limes, juiced (this is the sour component)

Method

• Sweat the onions and carrots over gentle heat for 15 mins, then add the curry paste and sir for a minte
• Add the stock and coconut milk, bring to the boil and simmer until carrots are soft
• Blend, add the fish sauce, sugar and lime juice.
• Now taste it.  You're looking for a good balance between the hot, sour, sweet and salt flavours so you may need to adjust some of the last four ingredients to get your desired balance.
• That's the base - you can chill or freeze it at this satge.
• To serve,  add your desired ingredients, bring to boil and cook until additions are fully cooked.
• Sprinkle with chopped coriander and serve