Pat dry the rack of lamb. Mix together the seasonings in a bowl and use it to season the lamb.
Press the sauté button on the Instant Pot. When hot, add the oil and the lamb, meat side down.
Sauté until browned, about 5 minutes. Remove from the pot and cancel sauté mode.
Pour the water into the pot and deglaze to remove any browned bits.
Set the lamb racks in the pot, standing up so the bones raise the meat out of the water. (If only cooking 1 rack, insert the trivet and set the rack on the trivet).
Lock on the lid and set the vent to sealing. Press the Pressure Cook (or Manual) button and set the time to 1 minute on high heat.
When done, allow it to do a 12-minute natural pressure release. Then release any remaining pressure. Transfer the lamb to a plate and tent it with foil. Let the lamb rest for 5-10 minutes.
Cut the lamb into chops and serve with your favorite side dish.
Notes
Rack of lamb is either sold in one or two racks, each with 8 ribs.You can make one or both racks without adjusting the cook time.You can use your own favorite rub instead of the seasonings we’ve used in the recipe.Be sure to salt the lamb well for full flavor.