1 cup good store-bought preferably organic mayonnaise
1/4 cup harissa
1 teaspoon lime juice
1 teaspoon honey
1 pound shell on cooked prawns /shrimp
Mix together all the sauce ingredients, and put into a bowl for dipping.
Arrange the prawns on a plate for people to pluck, peel and dip into the sauce, making sure you have enough in the way of plates or saucers dotted about the place for detritus.