Place chicken broth, heavy cream, grits, salt and butter in Ninja Foodi pressure cooker insert. Stir. Cover with pressure cooker cover. Make sure valve is set to "Seal."
Cook on High Pressure for 8 minutes. Once 8 minutes is up, allow the Ninja Foodi to natural release for 10 minutes. Press cancel and release the remaining pressure by turning the valve to "Vent."
Meanwhile, season fish with blackened or cajun seasoning by first spraying the fish, then rubbing the seasoning into both sides of the fish.
Once all pressure is released, open foodi and stir grits. Place a piece of heavy duty foil on top of the grits to cover. Lay the seasoned fish on top of the foil. Spray again with oil.
Close the Air Crisp lid on the ninja foodi. Cook at 400 degrees Farenheit for 10 minutes or until fish can be easily flaked with a fork.
Serve fish over grits and Enjoy :)