Thai coconut chicken soup

Ingredients

• 1 carrot, peeled and diagonally sliced
• 1 large onion, chopped
• 1 red pepper, cut into strips
• 4 garlic cloves, finely chopped
• 2 tbsp ginger, grated
• 2 tbsp fish sauce
• 2 tbsp Thai red curry paste
• 1 tsp vegetable oil
• 400g chicken fillets, cut into chunks
• 250ml chicken stock
• 200ml light coconut milk
• 200g mixed mushrooms, sliced
• Handful fresh basil leaves, chopped
• 2 tbsp fresh lime juice
• Fresh red chilli, seeds removed and sliced to serve (optional)