Preheat oven to 350 degrees Fahrenheit.
In a 9×13 inch baking dish, combine the cauliflower rice, rice, broccoli and spinach.
Drizzle with the lemon tahini dressing.
Cover the baking dish with foil and bake for 35-40 minutes, or until the rice is heated through and the broccoli is tender.
Remove from the oven and let cool slightly before serving.
Drizzle with extra lemon tahini dressing and sprinkle with parmesan cheese, if desired.