First things first, grab a large pan or a nice pot. Melt those two tablespoons of unsalted butter over medium heat.
Now, toss in your finely diced onion. Stir them around and let them cook until they're soft and looking translucent, which should take about 5 to 7 minutes. This builds a lovely, sweet base flavor.
Next up, the mushrooms! Add your thinly sliced cremini mushrooms to the pan. Cook them, stirring every so often, until they've released their liquid and started to brown nicely. This concentrates their flavor beautifully. Budget about 8 to 10 minutes for this step.
Time for the aromatics! Stir in your minced garlic and fresh thyme. Cook for just one more minute until you can really smell that amazing fragrance filling your kitchen. Be careful not to let the garlic burn!
Now, add the star of the show: the riced cauliflower! Stir it into the mushroom and onion mixture until everything is well combined.
Pour in your 1/2 cup of broth (remember, chicken or veggie works!). Bring the mixture to a gentle simmer, then turn the heat down to low.
Pop a lid on your pan and let the cauliflower cook until it's nice and tender. This usually takes about 5 to 10 minutes, depending on how fine your rice is and your stove. Give it a poke with a fork to check – you want it tender, not mushy.
Once the cauliflower is tender, take off the lid and stir in the heavy cream, grated Parmesan cheese, sea salt, and black pepper. This is where it gets wonderfully creamy and luxurious!
Keep stirring constantly for just another 1 to 2 minutes. You want everything to be heated through and the sauce to slightly thicken and coat the cauliflower.
Give it a taste! This is your chance to add a little more salt or pepper if you think it needs it. Getting the seasoning just right is key!
And that's it! Serve your beautiful, creamy cauliflower risotto immediately. It's best enjoyed warm as a side dish or even a light main.