In a small bowl, whisk together the lime juice, lime zest, minced cilantro, minced garlic, cumin, sea salt, black pepper, and half of the olive oil.
Place the chicken thighs in a shallow dish or zip-top bag and pour the marinade over them, ensuring they are well coated. Let marinate for at least 15 minutes.
Heat the remaining olive oil in a large skillet over medium-high heat.
Add the chicken thighs to the skillet and sear for 5-7 minutes per side, or until the internal temperature reaches 165°F and the exterior is golden brown.
Remove the chicken from the skillet and set aside to rest.
In the same skillet, add the cauliflower rice, diced red bell pepper, and rinsed black beans.
Sauté the vegetable mixture for 3-5 minutes until the cauliflower rice is tender and the peppers are slightly softened.
Serve the chicken thighs over the cauliflower rice and bean mixture, garnishing with extra fresh cilantro if desired.