Set Quick Cooker to Sear. Add oil to pot, heat for one minute.
Smash garlic, add to pot. Saute until lightly golden on all sides, about one minute.
Add chicken broth, heat another minute.
Hit CANCEL. Place cauliflower in steam basket, and place into Quick Cooker. Cover with lid, and set to CUSTOM setting, 3 minutes. Press START.
When timer is up, hit cancel. Push steam release button to quick release pressure. Open the lid halfway and let stand 3 minutes.
Drain out all of the liquid (you can save the liquid for another use) and mash the cauliflower and garlic with a potato masher, or transfer them to a blender or food processor. Add in butter, sour cream, salt and pepper. If you're using the blender, pulse until blended and creamy.
Transfer to an insulated bowl to keep warm while you're waiting for the rest of your dinner.
Lastly, add in Parmesan cheese and chives, and maybe another pat of butter. Stir well.