Heat the olive oil in a large pot over medium heat.
Add the chicken pieces and cook until browned on all sides. Remove and set aside.
In the same pot, add the onion, bell pepper, and garlic. Cook until softened.
Stir in the tomato sauce, rice, chicken broth, and browned chicken. Bring to a boil.
Reduce heat to low, cover, and simmer for about 30 minutes, or until the rice is tender.
Add the frozen peas, salt, pepper, oregano, and cumin. Cook for another 5 minutes.
Serve hot, garnished with chopped cilantro.