Add the onions and bell peppers to the skillet and cook for 3 minutes, stirring and scraping up the brown bits from the bottom of the pan. Reduce the heat to moderate, cover and cook for 5 minutes, stirring occasionally. Return the chicken to the skillet, nestling it into the onions and peppers. Cover and cook for 5 minutes longer. Uncover and add the honey. Cook over high heat, stirring and turning the chicken breasts, until the honey caramelizes, 1 to 2 minutes. Season with salt and pepper and serve right away.