Preheat oven to 400º. Cut or break cauliflower florets off main cauliflower stem, cutting florets in half if they are bigger than bite size. Pour oil in large bowl. Add florets, then salt and seasoning. Toss to thoroughly coat.
Spread cauliflower on parchment-lined baking sheet and roast 20 minutes. Check, stirring so that pieces get evenly golden. Roast an additional 15-20 minutes as needed.
Serve warm immediately as a side, or store for later use to add to other dishes as desired. Keeps 3-4 days.