Cauliflower cheese is essentially a cauliflower gratin. Tender roasted cauliflower florets and thyme-infused creamy white sauce baked together until crispy on top, and the cheesy sauce is bubbling around the edges.
Roasting: Cut the cauliflower into medium, bite-sized florets. Transfer onto a baking sheet. Drizzle with olive oil and a little salt and black pepper. Toss together and bake for 20 minutes or until tender.
Cheese sauce: Melt the vegan butter in a pan. Mix in thyme leaves and cook for a few seconds. Add the flour, and while consistently mixing, cook for 1-2 minutes. With one hand, stream in the oat milk, and with the other consistently mix everything together to prevent lumps. Turn off the heat and mix in the 1 cup grated vegan cheese and ground nutmeg.
Final touches: Transfer tender, roasted cauliflower into a baking dish. Pour over the cheese sauce. Sprinkle over the remaining grated vegan cheese on top and bake for 30 minutes. For a crispier top, turn on your grill/broiler and cook for a few minutes. Enjoy!