Measure and chop all ingredients. Add the bacon grease and continue to heat. Add grits. Stir them and let them toast in the bacon grease for a minute or two. Once toasted, add butter along with the onions, garlic and seasonings. Mix well and allow to cook for a minute or two more.
Add water and half and half and mix well. Close the lid and seal the vent and set to manual or pressure cook for 10 minutes. Once cooking time is up, cancel or turn off the IP and allow to NPR (natural pressure release) for 15 minutes.