6 boneless skinless chicken breast halves (6 ounces each)
1/4 teaspoon salt
1/4 teaspoon pepper
Place tomatoes in a small bowl; add boiling water. Let stand for 5 minutes. In another bowl, combine the spinach, feta cheese, onions, olives and garlic. Drain and chop tomatoes; add to spinach mixture.
Flatten chicken to 1/4-in. thickness; sprinkle with salt and pepper. Spread spinach mixture over chicken. Roll up and secure with toothpicks. Place in a 13-in. x 9-in. baking dish coated with cooking spray.
Cover and bake at 350° for 30 minutes. Uncover; bake 15-20 minutes longer or until a thermometer reads 170°. Discard toothpicks.