Combine feta and bacon in a mixing bowl. Place 1/4 cup of the cheese/bacon mixture on the center of each chicken breast. Fold breast over to enclose mixture; fasten with a toothpick or kitchen twine. Heat a large sauté pan and add oil. Heat oil to medium and add stuffed breasts; turn breasts while cooking to brown on all sides. Add tomatoes and seasoning to pan. Lower heat to a simmer; cook about 15 - 20 minutes or until chicken reaches an internal temperature of 165°. Place chicken on a serving platter (remove toothpicks or twine) and spoon tomato sauce over.