Preheat oven to 375 degrees F.
Heat extra virgin olive oil in a large pan on medium heat.
Sauté onions for approximately 5 minutes. Add garlic and cook for 1 minute more.
Add ground chicken to the pan and sauté until cooked through, making sure to crumble with a spatula.
Add the cauliflower rice, corn, black beans and green chiles to the pan. Sauté for 3-5 minutes and season with garlic powder, chili powder, cumin and dried oregano.
Stir in the chipotle sauce and season with salt and pepper to taste.
Remove from heat. Stir in the cilantro and set aside to cool.
To prepare the yellow bell peppers, cut off the tops and discard. Scoop out the seeds and membranes.
Divide the chicken mixture into each bell pepper and place in a baking dish cut side up.
Pour enough water in the baking dish to just fill the bottom. Cover with foil and bake 35 minutes. Remove foil and bake 5 minutes more.
Garnish with additional chopped cilantro (optional) and serve hot.