1Place potatoes in a shallow 1 1/2- to 2-quart microwave-safe baking dish. Cover dish with plastic wrap, venting one corner. Microwave with 650 watts for 8 to 10 minutes, or just until tender.
2Preheat a browning dish with 650 watts for 5 minutes, then add the oil and chicken. Heat with 650 watts for 3 minutes. Turn the chicken over and add the potato cubes. Cook for 2 minutes, toss the potatoes, then cook for another 2 minutes, or until potatoes are lightly browned.
3Mix in olives and oregano. Season with salt and pepper to taste. Sprinkle with feta cheese. Serve.