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.