In a separate pot, steam the cauliflower and carrots for 10 - 15 minutes, until tender.
Transfer the veggies to a blender along with the remaining ingredients. Blend on high until smooth and creamy.
Pour sauce (you'll probably only need 1/2 - 3/4 of the batch) over the quinoa and stir to combine. Taste and season with a bit more nutritional yeast or buffalo sauce to amp up the flavor.
Serve immediately or stir in your additions if using.
Notes
You will probably have a little bit of leftover sauce. Keep it and serve it over spiralized zucchini for lunch the next day!