Preheat oven to 350ºF.
Fill a large saucepan with about an inch of water, and insert a steamer basket. Bring the water to a boil, and add the cauliflower florets. Reduce the heat to a simmer and cover, allowing the cauliflower to steam for 6-8 minutes, or until fork tender.
In the meantime, place garlic on a parchment lined baking sheet and drizzle with 2 Tbsp. of the stock. Bake for 5-10 minutes or until garlic is aromatic.
Next make the gravy by adding vegetable stock, soy sauce, wine, mushrooms, garlic, thyme, rosemary, nutritional yeast if using, salt and pepper. Whisk together water and quinoa flour in a small bowl. Whisk flour mixture into the gravy and continue heating until gravy thickens.
Drain the steamed cauliflower, and transfer to the bowl of a large food processor. Add in remaining vegetable stock, roasted garlic, thyme, chives, salt, pepper and process to your desired texture.
Add to serving plates and top with gravy just before serving! Yum!