Preheat oven to 425F degrees.
In a small bowl whisk spices together; cumin, coriander, turmeric, garlic powder, ginger, allspice, cayenne, salt, and black pepper.
In a large bowl, toss cauliflower florets with olive oil (add a little more olive oil if needed to coat well) and add shawarma spices, tossing well.
Place on a baking sheet pan in a single layer with parchment or well-oiled. Bake for 25 minutes or until golden brown on the edges and tender.
