Prepare the base of the vertical charcoal smoker with plenty of charcoals and light it up. Until the smoker heat comes up to 300F, prepare the clay pots as follows.
As the Vertical Charcoal smokers are not big enough, we need to fit 4 Servings into 2 Clay Pots. So, divide all ingredients into 2 equal portions and set aside.
In a big bowl, mix all ingredients (except butter) and divide the mix into two portions. Then fill the clay pots equally.
Once all clay pots are filled, add 2 tablespoons of butter to each pot and close the top of the clay pot with aluminum foil. Make sure you cover the top of clay pots very well.
Place the clay pots to the center of Vertical Charcoal Smoker and close the smoker door and let it cook 1 hour straight. After one hour, open the smoker door and make a small hole to the aluminum foil center to create a pressure-cooker atmosphere and cook an additional 30 minutes more.
Take out the clay pots from the vertical charcoal smoker and remove the aluminum foil.