01 -
Preheat the oven to 450°F (232°C).
02 -
In a large bowl, toss the cauliflower florets with butter. Season with sea salt and black pepper.
03 -
Transfer the cauliflower to a small 1.5-quart (1.4 L) casserole dish in a single layer. Roast in the oven for 25-30 minutes (or 15-20 minutes on a sheet pan), stirring halfway through, until crisp-tender.
04 -
In the same bowl, whisk together the sour cream and heavy cream until smooth. Stir in the minced garlic, half of the cheddar cheese, half of the bacon, and half of the green onions. Season with sea salt and black pepper to taste, being cautious not to over salt.
05 -
When the cauliflower is done roasting, remove it from the oven and leave the oven on. Add the cauliflower to the bowl and mix with the sauce.
06 -
Return the cauliflower mixture to the casserole dish. Top with the remaining cheese and bacon.
07 -
Bake for 5-10 minutes, until the cheese melts. Top with the remaining green onions before serving.