Place the raw chicken pieces into the slow cooker, spreading them out evenly.
Sprinkle the cumin, paprika, and garlic powder over the chicken, then pour in the broth to cover the ingredients.
Cover the slow cooker with the lid and cook on low for about 6 hours, until the chicken is tender and easily pulls apart with forks.
While the chicken cooks, rinse the rice thoroughly until the water runs clear, then set aside.
Chop the bell pepper and onion into thin slices or small chunks, depending on your preference.
Once the chicken is cooked, remove the lid and shred the meat using two forks, mixing it with the flavorful juices.
In a separate pot, cook the rinsed rice according to package instructions, usually simmering in twice the amount of water until fluffy and tender.
In a skillet or the same pot, sauté the sliced vegetables until they are slightly softened and fragrant, about 3-5 minutes.
To assemble, spoon the fluffy rice onto plates, top with shredded chicken and sautéed vegetables, and garnish with chopped cilantro and lime wedges.
Finish with a drizzle of hot sauce or a sprinkle of cheese if desired, and serve hot, enjoying the smoky, tender bites.