Preparation Sprinkle chicken with salt and pepper. Heat oil in large skillet over medium-high heat. Add chicken and sauté until brown, about 4 minutes per side. Transfer chicken to plate. Pour off all but 2 tablespoons drippings from skillet. Add onion to drippings in skillet. Sauté over medium heat 3 minutes. Add garlic and stir until fragrant, about 1 minute. Add tomatoes with juices, olives, wine and oregano. Return chicken and any accumulated juices to sauce; bring to boil. Reduce heat to medium-low, cover and simmer until chicken is tender and cooked through, about 25 minutes. Transfer chicken and sauce to platter. Sprinkle with feta cheese and serve.
Preparation Sprinkle chicken with salt and pepper. Heat oil in large skillet over medium-high heat. Add chicken and sauté until brown, about 4 minutes per side. Transfer chicken to plate. Pour off all but 2 tablespoons drippings from skillet. Add onion to drippings in skillet. Sauté over medium heat 3 minutes. Add garlic and stir until fragrant, about 1 minute. Add tomatoes with juices, olives, wine and oregano. Return chicken and any accumulated juices to sauce; bring to boil. Reduce heat to medium-low, cover and simmer until chicken is tender and cooked through, about 25 minutes. Transfer chicken and sauce to platter. Sprinkle with feta cheese and serve.