Preheat your oven to 400ºF (200ºC, or gas mark 6).
Prepare a baking sheet with parchment paper.
Mix the cauliflower, oil, and salt in a bowl until the cauliflower is well coated.
Spread the cauliflower across the baking sheet and bake for 25 minutes.
Cool the cauliflower for 5 minutes and then gently pulse a few times in a food processor, or until it has the texture of large pieces of rice. Don’t over pulse it or it will become mushy.