Wash, peel and dice the vegetables. Finely chop the shallot. Heat the oil and steam the shallots. Add the vegetables and after 5 minutes stir in the curry paste. After a few minutes pour in the bouillon and bring to the boil. Cook in a closed pot for about 30 minutes, until the vegetables are soft. Puree with the hand blender while adding the coconut milk. Serve sprinkled with coriander leaves and the lime zest.