Combine seasoning mix in a small bowl and set aside.
Melt chicken fat in a large skillet over medium high heat and sauté pork and bay leaves until meat is browned , about 3-4 minutes, stirring occasionally.
Reduce heat to medium and add seasoning mix, onions, celery, peppers and garlic and cook until onion starts to become translucent, about 5-7 minutes. Stir constantly to prevent too much sticking.
Add stock and loosen all of the browned bits on the bottom of the pan. Add chicken livers and cook for 2 minutes.
Add rice and stir. Reduce heat to low, cover pan and simmer for 10 minutes. Turn off heat and let rice sit, covered, for another 5-10 minutes until liquid is absorbed.
Remove bay leaves and serve.