In a large skillet, heat oil to medium and add chopped onions and garlic.
Rinse and slice the chicken breasts into 1 inch thick diagonal slices. Place in skillet to brown. Turn over and add remaining ingredients, except for the cilantro,
Lower heat to simmer, cover and simmer for 30 minutes. Open lid and add cilantro over the the top. Cover and simmer for 5 more minutes.