Serves two people as a main dish, or four as a side.
Preheat oven to 350. Slice the cauliflower in half from top to stem, leaving the stem intact. Slice one or two 3/4 inch "steaks" from the top to the stem. Laid flat, these should look like stencils of trees.
Heat the oil in a heavy, oven-proof skillet. Brush steaks with oil, sprinkle with salt and pepper. Sear steaks until golden brown, about 2 minutes per side. Place skillet in the oven to bake for 10 minutes.
For optional Cauliflower cream sauce:
Cut the remaining cauliflower into florets. Boil in water and the liquid portion of the coconut milk for 10 minutes. Strain. Add the cream portion of the coconut milk and puree with immersion blender. Lay the sauce, then top with half of whole steak.