Heat a large pan on medium heat. Add the butter and oil to the pan, once the butter has melted add in the mushrooms and brown onions. Cook, stirring occasionally for 5-7mins until the mushrooms have browned and onion becomes translucent. Add the rice and thyme to the pan and stir.

Pour in 1 cup of stock and allow for it to be absorbed by rice, repeat until all stock has been added. Then finally stir through the cauliflower rice and green peas and cook for another 2mins, then stir through the parmesan cheese and serve immediately!