Preheat the oven to grill.
Caramelised onions
To make the caramelized onions, heat the butter over a medium-low heat until it froths. Add the onions and cook, stirring frequently for about 20 minutes, until the onion is very soft. Add the balsamic vinegar and brown sugar and cook for another 10 minutes. Season as required.
Beef
Meanwhile, pat the steak dry with a paper towel, brush with oil and season with salt and pepper. Heat a BBQ to a high heat. Add the steak and cook for a couple of minutes until one side is browned and crunchy. Turn over and cook for another couple of minutes, or until done to your liking (check out recipes.co.nz for timings).
Transfer to a wooden board loosely covered with foil to rest for 5-10 minutes before carving into thin slices across the grain.
Mushrooms
Heat a little oil in a pan over a medium-high heat. Add the garlic, mushrooms, and thyme and cook for 5-10 minutes until soft. Add the spinach and cook for another 5 minutes until most of the moisture has been evaporated. Stir in the mustard and parsley, and season as required.
To serve
Lightly toast the Turkish bread and spread with mayonnaise and/or relish. Top with extra spinach leaves and then spoon some mushroom mixture on the base and add the cheese slices. Cook under the grill for a few minutes to melt the cheese, then add some sliced steak, pickles (if using) and top with caramelized onions. To finish, sprinkle with chopped chives. If you like, add a few drops of hot chilli sauce for extra kick!
Recipe from recipes.co.nz
