Preheat oven to 450 degrees. Place cauliflower into plastic bag. Drizzle olive oil over florets to barely coat. Add garlic powder, salt and pepper. Close bag and toss ingredients around so all florets are coated. Place on ungreased cookie sheet or baking pan and bake on middle rack for 15 minutes, turning florets once during baking. Check them at the 10 minute mark for desired tenderness. Remove florets from oven. Toss cauliflower and hot sauce together in a glass bowl. Return to oven and cook for additional 5 minutes. Serve with ranch or blue cheese dressing.