1. Heat a pan and add honey. Add salt and balsamic vinegar and mix well.
2. Stir in the red chilli flakes, remove from heat & keep warm.
3. Thread the prawns and grapes onto a skewer in the following order: black grape, prawn, red grape and finally green grape.
4. Season with salt and cook on an oiled grill, basting with oil and turn around, so that prawn cook evenly on all sides.
5. Arrange the prawns and grapes on a platter.
6. Pour the sauce over and serve hot.