Heat the oil in a large skillet over medium heat.
Add the ground beef and chicken livers.
Cook until browned, breaking them up as they cook.
Add chopped onions, bell peppers, celery, and minced garlic to the skillet.
Sauté the vegetables until they are soft and fragrant.
Stir in salt, black pepper, and cayenne pepper.
Mix everything thoroughly to combine all flavors.
Pour in chicken broth and bring the mixture to a simmer.
Let it cook for about 10 minutes to blend all the flavors.
Add the cooked long-grain rice to the skillet.
Stir well to ensure the rice absorbs the flavors from the mixture.