Step 1

Combine all the seasonings in a small bowl and mix them together. Season the roast evenly with the seasoning mixture. Be sure to rub the seasoning into the roast.

Step 2

Turn the Ninja Foodi to the saute function. Add the oil to the pan, and sear the roast for about 3 minutes on each side. Next, add in the celery, carrots, garlic, and onions.

Step 3

In a cup, mix together the warm water, beef base, and Worcestershire sauce. Then, pour the mixture into the pot with the pot roast and vegetables.

Step 4

Turn the Ninja Foodi to the pressure cooker setting, and pressure cook on High for 90 minutes. Make sure that the pressure cooker valve is turned to the "Seal" position.

Step 5

Once the roast is done cooking, remove the roast and vegetables from the pot and transfer them to a serving plate.

Step 6

Optional. To thicken the gravy: Turn the pressure cooker to the saute function. Mix 1 tablespoon cornstarch with 1 tablespoon water to make a cornstarch slurry. Wisk the slurry into the gravy. Taste the gravy, and adjust the seasonings to your liking if necessary. Spoon your desired amount of gravy over the pot roast and vegetables. See notes for lower carb thickening option.