Cook the Birds Eye Ultimate Chicken Fillet Burgers for 24 minutes at 190°c.
Preheat a griddle pan, and when piping hot grill the buns until griddle marks appear.
Make the coronation sauce: Combine the ingredients in a bowl, and set aside.
Make the English mustard mayonnaise: Combine the ingredients in a bowl, and set aside.
Make the pickled carrots: Combine the carrots and cucumber with the white wine vinegar, and season to taste.
To serve: To build the burger, coat the bottom bun with the english mustard mayonnaise and layer the burger with red onions, lettuce, the pickled veg, the ultimate chicken burger, coronation sauce and chopped coriander and top with the top of the bun