Soak the dry soy curls in warm water for 10 minutes until softened, then drain and squeeze out as much excess moisture as possible.
Slice the King oyster mushrooms into long, thin strips to mimic the texture of traditional shawarma meat.
Heat the olive oil in a large skillet over medium-high heat and add the prepared soy curls and sliced mushrooms.
Sprinkle the cumin, smoked paprika, turmeric, garlic powder, sea salt, black pepper, and nutritional yeast over the mixture, tossing well to coat every piece.
Sauté the mixture for 8-10 minutes, stirring occasionally, until the mushrooms are tender and the soy curls have developed a golden, crispy exterior.
In a small mixing bowl, whisk together the tahini, lemon juice, and water until the sauce is smooth and reaches a pourable, velvety consistency.
Place the fresh baby spinach in a serving bowl, top with the warm mushroom and soy curl shawarma, and finish by drizzling the tahini sauce over the top.