Preheat the oven to 450 degrees F. Cut the cauliflower into florets, removing most of the stems. Place the strips of bacon on the ends of a large rimmed 13x18 inch baking sheet. Spread the cauliflower florets in the middle of the baking sheet.
Roast in the oven for 15-20 minutes, until the bacon is red and crispy. Remove the bacon with tongs and place on a paper towel lined plate to drain. Toss the cauliflower in the bacon grease and spread back out. Then sprinkle with salt and pepper. Roast another 5 minutes until the cauliflower is crispy around the edges, yet tender in the center.
Move the cauliflower to a platter. Drizzle with buffalo wing sauce. Cut (or crumble) the bacon and sprinkle over the top of the cauliflower. Then sprinkle crumbled blue cheese and chopped scallions over the top. Serve warm.