Preheat oven to 550°.
Chop the cauliflower into bite-sized florets & place on a large baking sheet. Toss with 4 Tbsp olive oil, the salt & pepper.
Put the coated cauliflower in the preheated oven & turn on the broiler. Broil until the top side is browned,7-8 minutes. Flip & roast until the other side is browned,3-4 minutes.
Heat the orange sauce until hot but not bubbling.
Remove cauliflower from the oven. Pour sauce over the cauliflower & toss to coat well. Garnish with the parsley, cilantro, hot sauce, or peanuts. Serve.