Place trivet or metal rack that came with your Ninja Foodi in the pot.
Place corned beef, fat side up, on top of a trivet or metal rack- I rinse my corned beef first. Rinsing the corned beef helps to remove the extra salt that is on the outside. If you don't rinse the corned beef, it may be too salty once cooked.
Top the corned beef with garlic and spread around on the top. There is no need to stir the spices or garlic as they will combine with the liquid while pressure cooking.
Close the pressure cooking lid and set the valve to the "seal" position and cook on high pressure for 90 minutes.
When the timer beeps, and the pressure cooking cycle has ended, natural release pressure for 20 minutes.
Open the lid and remove the corned beef and set aside in a dish.
Add the potatoes, carrots, and green cabbage to the remaining water/broth in the Ninja Foodi. ***If preferred, you can boil the carrots, potatoes, and green cabbage on the stovetop over medium-high heat instead of pressure-cooking them.
Close the pressure cooking lid and set the valve to the "seal" position and cook on high pressure for 2-4 minutes based on your preference. The longer the cooking time, the more cooked the vegetables will be.
When the timer beeps, quick-release the pressure and open the lid. It's time to eat! Enjoy!
Video
Notes
Why is my corned beef tough from the pressure cooker?If the corned beef is tough even after pressure cooking it, it likely needs more pressure cooking time. You can put the corned beef back into the pressure cooker and cook longer.How long should you pressure-cook corned beef?90 minutes is the perfect amount of time to pressure-cook corned beef. You can even cook several corned beefs at the same time, stacked on top of each other. If cooking frozen corned beef, stick with the 90 minutes. The corned beef will start to thaw while the pressure cooker is reaching temperature and pressurizes. It will take longer to get to temp/pressure with frozen corned beef but the actual cook time will remain at 90 minutes.