This is a (sort of) cauliflower cheese, but a rather glorofied one, from the link tin_sword_arthur provided. It looks rather good! :
Cauliflower Gratin with Gruyere and Hazelnuts:
1 medium head cauliflower (2 1/2 to 2 3/4 pounds)
1/2 cup crème fraiche (store bought or homemade - see recipe below)
3/4 cup (3 ounces) grated Gruyère cheese, divided
Coarse salt and freshly ground black pepper
3 tablespoons dry, unflavored bread crumbs
3 tablespoons hazelnuts, toasted and coarsely chopped*
2 tablespoons chopped chives or flat leaf parsley for garnish
* To toast hazelnuts, spread on a rimmed baking sheet and bake in a preheated 350-degree oven until browned and fragrant, approximately 6 to 8 minutes. Remove and when cool enough to handle, place nuts in a kitchen towel and rub together to remove as much of the skins as possible.
Preheat oven to 375 degrees F. Butter a 2-quart oven-to-table baking dish or gratin pan; set aside.
Cut off and discard base of cauliflower, then cut the head into small, individual florets.
Bring a large pot of water to a boil and salt generously. Add cauliflower florets to pot and cook until tender (but not mushy) when pierced with a sharp knife, about 5 minutes. Drain florets and pat dry with a clean kitchen towel.
Place cauliflower in prepared dish and toss with crème fraiche and half of the cheese. Season to taste with salt and pepper. Sprinkle remaining cheese over cauliflower, then top with bread crumbs and hazelnuts. Bake on center rack of oven until cheese has melted and bread crumbs and nuts are golden, 20 to 25 minutes or more. Garnish with chives or parsley.
Serves 5 to 6.
Crème fraiche is available in many supermarkets. If you can't find it, the following recipe works well. It needs to be made at least 6 hours in advance.
1 cup heavy cream
1/3 cup sour cream
Whisk cream and sour cream together in a medium non-reactive bowl. Let stand at room temperature until thickened, 6 hours or longer. Cover and refrigerate. NOTE: Crème fraiche can be stored up to 1 week, covered, in refrigerator.
Makes about 1 1/3 cups.