Preheat oven to 400F.
Break the cauliflower into florets and place them in a large mixing bowl. Drizzle with olive oil, lemon juice, and sprinkle with all the spices. Stir to evenly distribute.
Roast seasoned cauliflower in the oven for 35-40 minutes, or until it begins to turn brown, turning occasionally.
When they are done cooking, remove them from the oven and serve hot!