Prepare for Roasting: Preheat your oven to 400°F / 200°C.
Line a large, rimmed baking sheet with parchment paper for easy cleanup.
Season the Cauliflower: Core the cauliflower and chop the florets into uniform, bite-sized pieces.
In a large bowl, toss the florets with avocado oil and salt until evenly coated.
Spread the cauliflower in a single layer on the prepared baking sheet.
First Bake: Sprinkle the chopped bacon and sliced green onions evenly over the cauliflower.
Roast for 25 minutes, or until the cauliflower is tender and starting to brown at the edges.
Melt the Cheese: Remove the pan from the oven and sprinkle the shredded cheddar cheese all over the top. Return to the oven and bake for an additional 2-4 minutes, just until the cheese is perfectly melted and bubbly.
Serve Immediately: Serve hot, garnished with a dollop of sour cream or a drizzle of Ranch dressing, if desired.
Don't overcrowd the pan.
Spreading the cauliflower in a single layer ensures it roasts and caramelizes instead of steaming, giving you the best flavor and texture.
Shred your own cheese! Pre-shredded cheeses often contain anti-caking agents that can prevent them from melting as smoothly.