Place the turnip noodles into a food processor and pulse until rice-like.Place a large pot over medium heat and add in the olive oil. Once oil heats, add in the onion, mushrooms, garlic and red pepper flakes and cook for 5 minutes or until onions turn translucent and mushrooms begin to wilt.Add in the turnip rice and season with oregano, salt and pepper. Stir to combine and add in the tomatoes.Cook, uncovered, for 10 minutes, stirring frequently, or until turnip rice softens and cooks to your preference. Once cooked, fold in the cheese and stir until fully combined.Transfer to a serving dish, garnish with parsley and serve immediately.