Heat oil in a pan and add sliced onion. Saute until the onion turns translucent.
Add minced garlic and the chopped white part of scallion. Saute for a few seconds.
Add sliced mushrooms and cook until the moisture released by mushrooms dries up and the mushrooms are cooked.
Add enchilada spice blend and saute for a few seconds.
Next, add salsa and saute for a minute.
Add spinach and cook for a few minutes.
Once the spinach leaves get wilted add chopped scallion and cilantro. Mix everything and switch off the stove.
Take a tortilla and spread around 1 tablespoon of enchilada sauce on one corner of it.
Spread a generous amount of mushroom filling on top of the sauce.
Top it with some shredded cheese and roll the tortillas tightly. Repeat the process with all the remaining tortillas.
Spread some enchilada sauce on a baking dish.
Arrange the tortilla rolls on it with the open side down.
Spread the remaining enchilada sauce over the rolls.
Top it with shredded cheese.
Bake in a preheated oven at 200°C (around 400° F) for 18-20 minutes or until the cheese melts and starts getting golden brown patches.
Garnish with chopped onion, cilantro, and scallion. Enjoy!