Step 1

Remove steak from fridge and brush all over with mustard. Combine spices, 2 tbs salt flakes and 2 tsp ground black pepper and scatter all over steak. Leave for at least 30 minutes to come to room temperature.

Step 2

For salsa, combine all ingredients in a bowl and season well. Cover and refrigerate until ready to serve.

Step 3

Heat barbecue to high, drizzle steak with oil and cook, turning regularly, for 15-20 minutes until well charred and cooked medium-rare to medium. Place on a tray and leave to rest for 10 minutes. Thickly slice and place on a large platter or wooden board and squeeze lime over. Serve sliced steak with salsa criolla.