This is such an easy barbecue recipe for a crowd, we've given it to you in large quantities! Give the fillets a few bashes with a mallet to make them a more uniform thickness, if you like.
There are lots of Herbie's Spices blends that can be used in this way. You might like to try any of the following instead of the Cajun spice used in the recipe: Smokey Barbecue Spice; Italian Seasoning; Balmain & Rozelle Spice; Tasty Meat Sprinkle; Berbere; or Chermoula.