01 - Preheat the oven to 425°F. Line a large baking sheet with parchment paper.
02 - Remove the leaves and trim the stem of the cauliflower, keeping the core intact. Slice the cauliflower into 1/2-inch thick coins or rounds. Some florets will break off — set those aside to roast as well.
03 - Arrange the cauliflower coins and any loose florets in a single layer on the prepared baking sheet.
04 - In a small bowl, combine the smoked paprika, garlic powder, cumin, salt, black pepper, and cayenne pepper if using.
05 - Drizzle the olive oil over the cauliflower and sprinkle the spice mixture evenly on both sides. Toss gently to coat.
06 - Roast in the preheated oven for 25–30 minutes, flipping the coins halfway through, until golden brown and crispy on the edges.
07 - Serve hot, garnished with fresh herbs if desired.