To make the parmesan biscuits, heat the grill to high. Line a baking sheet with baking parchment and divide the grated parmesan into 6 long strips. Grill for 1 min or until the cheese has melted and is lightly golden. While still warm and a bit flexible, release the biscuits from the baking parchment with a palette or cutlery knife, then cool until firm.
4 To serve, heat the soup and divide between 6 bowls. Scatter with mint leaves and finely sliced chives, and serve with the parmesan biscuits on the side.