These prawns are easy to prepare, simple, stylish, and great Christmas entrée. A fast, easy alternative to the traditional prawn cocktail the family will love – and the avocado dressing really kicks off its flavor. Confession time: prawn cocktail is my secret vice. When I get home late after working in the Fat Duck there’s nothing I like better than to raid the fridge for prawn cocktail. Homemade, shop-bought – at two in the morning I don’t really care. But given the choice, I’d go for the recipe below. It is best if you make your own mayonnaise, but you can use jarred. And my own personal tip: put a little chopped basil and tarragon into the mix to introduce some fresh, lively extra flavor.