Heat the olive oil in a large skillet over medium heat.
Add the diced chicken to the skillet and season with salt and pepper. Cook until the chicken is browned and cooked through, about 5-7 minutes.
Remove the chicken from the skillet and set it aside. In the same skillet, add the chopped onion, garlic, and bell pepper. Sauté for 3-4 minutes until the vegetables are softened.
Stir in the diced tomatoes, green chilies, chili powder, cumin, paprika, and onion powder.
Pour in the chicken broth and bring the mixture to a simmer.
Add the cauliflower rice and stir to combine.
Return the cooked chicken to the skillet, stir everything together, and cook for an additional 5-7 minutes, allowing the flavors to meld and the cauliflower rice to cook through.
Sprinkle the shredded cheddar cheese over the top, cover the skillet, and let it sit for 2-3 minutes until the cheese has melted.
Garnish with fresh cilantro if desired, serve immediately, and enjoy!