Mise en place:
Make the marinade: Combine the marinade ingredients together in a medium bowl to form a wet paste, add the chicken and toss to coat well. Put the chicken in a plastic zip-top bag, squeeze all of the air out and refrigerate for at least an hour or overnight. Once you start prepping the rice ingredients, take the chicken out of the fridge and allow to sit at room temperature. This will allow the chicken to cook more evenly later.
Prep the other ingredients: Roughly chop the onion, bell pepper, celery and garlic and add to a food processor. Pulse to finely chop or manually chop the veggies finely, set aside in a bowl. Finely chop the mushrooms in the food processor, set aside in a separate small bowl. Puree the chicken livers in the food processor until very smooth, set aside in a third small bowl. Slice the sausage about 1/4″ thick and on a bias, set aside on a plate. Measure out the spices and herbs and set aside in a small bowl. Measure out the rice and chicken stock, set aside.