Preheat the oven to 400 degrees F.

Core the cauliflower and cut into bite-sized florets and place in a large mixing bowl.

In a small bowl, combine the cumin, coriander, turmeric, cayenne pepper, salt, and black pepper.

Add cooking oil onto the cauliflower and toss until the cauliflower is coated. Then add the spices and toss again until the cauliflower is evenly coated.

Line a large rimmed baking sheet with parchment paper. Pour the cauliflower on the baking sheet. Spread the cauliflower out so that they are not piled on top of each other. When they are spread out, they cook more evenly.

Roast for about 25-30 minutes or until lightly browned.