In a large skillet, heat the oil over medium high heat. When hot, add the butter, onions, and bell peppers and sauté vegetables until tender and lightly caramelized, 4 to 6 minutes. 
Add the pork and cook, using the spoon to break the pork into small pieces of meat, until well-browned, 1 to 2 minutes. Add the liver puree, bay leaves, jalapeno, salt, coriander, cumin, and cayenne and cook until liver is cooked through and spices are fragrant, 2 to 3 minutes.
Add the cooked rice and beef stock and continue to cook, stirring, until well-combined and rice is heated through, 2 to 3 minutes longer.

Adjust the seasoning if necessary and add hot sauce to taste.