Spread one slice of bread with the mayo and top with a layer of rocket.
Top with onion bhajis in one layer, you may fit more than two on depending on the size.
Add a layer of coronation coleslaw.
Spread the other slice of bread with mango chutney, top your sandwich and cut in half.
Notes
Try this recipe for vegan coronation coleslaw or use the same spices to tweak standard slaw. Heck you can use plain coleslaw if you like, but you'll miss a taste sensation.
You could use bloomers bread or even toast to make this sandwich.
This sandwich is best eaten on the day it is made.