Step 1

Place strips of onion in a bowl of ice cold water.

Step 2

In a medium bowl, place egg yolks, juice, mustard, salt and pepper. Using a whisk or electric hand beaters, beat until well combined. Begin to add oil, a few drops at a time, until it is well incorporated and the mayonnaise starts to thicken. Then, add oil in a thin stream, whisking constantly. Stir in sweet chilli sauce; season to taste.

Step 3

Arrange salad leaves, mango and prawns on a serving platter. Drizzle with the sweet chilli mayonnaise, mostly on the prawns, then top with drained onion and coriander leaves.