Vegetarian Thai-style Green Curry

Ingredients

• 3 green chillies (stalks removed, roughly chopped )
• 3 cloves of garlic (peeled)
• 3 cm thumb of fresh ginger (peeled)
• 1 onion (peeled and roughly chopped)
• 1 tbsp lemongrass paste
• 20 g bunch of coriander (a few sprigs reserved for garnish)
• 1 tbsp vegetarian fish sauce
• 1 tsp ground coriander
• grated zest of 1 lime
• 400 ml light tinned coconut milk
• 125 g sweet potato (peeled and cut into 1cm dice)
• 2 peppers (deseeded and sliced (yellow and green are best))
• 1 courgette (cut into half-moon slices)
• 75 g baby corn (sliced in half)
• 75 g sugar snap peas
• juice of a lime
• 200 ml water
• salt (to taste)
• low-calorie cooking spray