STEAK SANDWICH WITH ONIONS, MUSHROOMS, HAVARTI & AVOCADO
PREP TIME
 25 mins
 COOK TIME
 20 mins
 TOTAL TIME
 45 mins
 Author: Cooks with Cocktails
 Serves: 6 - 8
 INGREDIENTS
 - FOR THE STEAK MARINADE
 - 1 large flank steak
 - ¾ cup soya sauce
 - ¼ cup citrus juice (I have used orange juice,pineapple juice and a mixture of citrus juice)
 - 4-5 clove of garlic (chopped finely)
 - 1 tbsp of grated ginger
 - 3 tbsp brown sugar
FOR THE CARAMELIZED ONIONS - 1 tbsp olive oil or butter
 - 1 large onion, sliced
 - 1 tsp salt
FOR EACH SANDWICH - 1 bun (we used ciabatta buns)
 - ½ cup sliced flank steak
 - ¼ cup caramelized onions
 - 1 big slice of havarti cheese
 - 1 tbsp mayo (or a little more or less depending on your tastes)
 - 1 tbsp mustard (or a little more or less depending on your tastes)
 
INSTRUCTIONS
 - flank steak recipe, carmalized onion and mustard mixed with mayo
 - Place the marinade ingredients in a ziplock bag and marinate the flank steak at least 4-5 hour or overnight is best.
 - While the steak is marinating, make your caramelized onions. Heat a pan on medium-low heat, add the oil or butter, your sliced onions and sprinkle with the salt. Cook for 8 - 10 mins or until the onions get nice and browned and sweet. Stir every couple mins. Be careful not to burn them. Set them aside to cool.
 - When you are ready to cook your steak, heat your barbecue to medium-high heat. Wait for it to get nice and hot. So you can't hold your hand over the grill for more than a second.
 - Throw your steak on the grill and cook for 4 mins. Then turn slightly, a quarter turn, and cook for another 4 mins. This will get you beautiful criss-cross char marks on your steak. Then turn it over and do the same on the other side.
 - Take the steak off the grill and tent (cover) it with foil for at least 5 mins or up to 10 to let it rest and the juices redistribute.
 - With a sharp knife, slice the steak in thin slices against the grain.
 - When you are ready to make your sandwiches, put your oven on broil.
 - Make your sandwich by brushing the bottom of the bun with a little mayo (optional) then piling the steak on top, followed by the onions and the cheese on top of it all. Place the bottom halves on a tray and put them under the broiler for a couple mins until the cheese is all melted.
 - Spoon some mustard and mayo on the top half of the bun and place it on top of the melted cheese.
 - Serve!