Preheat the oven to 190℃. Line a baking sheet with parchment paper and set aside.
Using a fork, shred the mushrooms and separate any large pieces.
Add olive oil, salt, pepper, sumac, cumin, coriander, and chili powder. Massage the oil and spice blend into the mushrooms well and transfer to the baking sheet.
Bake in the oven for 15-20 minutes.
Cooking the onions:
While the mushrooms are baking , start cooking the onions.
Heat olive oil in a pan, then add the sliced onion.
Add salt, pepper, and sumac, and let them cook for 10 minutes on medium-high heat, till the onions are caramelized and soft.
Making Musakhan rolls:
Preheat the oven to 200℃. Line a baking sheet with parchment paper, and set aside.
Open the wrap/tortilla, add the mushrooms and onions in the middle, and roll it
Transfer the rolls to the baking tray, and put the rolls face down.
Brush the rolls with olive oil sprinkle sumac powder and bake in the oven for 7-10 minutes.
Flip the rolls, brush the other side with olive oil sprinkle more sumac powder, and bake for 7-10 more minutes till crispy.
Remove from oven, sprinkle more sumac powder, drizzle of olive oil, and add the pine nuts. Serve and enjoy