- Cut cauliflower into florets and place in a large roasting pan. In a small bowl, whisk together oil, vinegar, sumac, pepper, and salt.
- Pour over cauliflower and stir so each piece is evenly coated.
- Cover with foil and roast at 400 degrees for 20 minutes or until cauliflower is soft.
- For a fancier presentation, top with fresh chopped parsley before serving.