In a large ziplock bag, add all the ingredients (EXCEPT the 2 tbsp avocado oil) and mix well. Let it sit for at least 15 minutes or up to 24 hours in the refrigerator.
To make the salad, mix all the ingredients together and set aside.
In a cast iron skillet, heat the 2 tbsp of avocado oil on medium heat. Then add the beef evenly to the skillet. You may have to do this in batches. Cook for about 4-5 minutes per side.
To the plate, add a smear of hummus on the plate. Then top with the beef shawarma. I served mine with a cucumber tomato salad, store-bought tzatziki, tahini sauce, and roasted potatoes.