Melt the coconut oil in a skillet over a low/medium heat. Finely dice the onion and thinly slice the garlic. Add the onion and garlic to the skillet and sweat gently until tender and fragrant.
Slice the tough ends from the asparagus. Roughly dice the mushrooms and asparagus spears into 1 inch chunks. Add the asparagus and mushrooms to the skillet and pan-fry for 2-3 minutes to soften a little.
Add the cauliflower rice to the skillet along with the salt and pepper. Stir well to combine. Cook through for a minute, then add the vegetable stock. Bring the stock up to a boil. Reduce down to a simmer and stir well. Simmer for 5-8 minutes or until all liquid has evaporated and the asparagus is tender.
Finely chop the fresh chives. Squeeze the lemon juice over the risotto and sprinkle over the nutritional yeast and fresh chives. Stir well to combine. Serve immediately.