Chicken and lemongrass soup with noodles

Ingredients

• 2 tablespoons olive oil
• 1 kilogram chicken drumsticks
• 1 red onion, thinly sliced
• 1 stem lemongrass, bruised
• 2 kaffir lime leaves, bruised
• 1 tablespoon Thai red curry paste
• 1 litre chicken stock
• 2 x 400ml cans coconut milk
• 270 grams ramen noodles, cooked to packet instructions
• 1/4 cup fish sauce
• 2 teaspoons sugar
• sliced red chilli, coriander sprigs, lime wedges to serve