Place onion, red pepper and garlic in a 6-qt. electric pressure cooker; top with chicken. In a small bowl, whisk broth, brown sugar and seasonings; pour over chicken. Top with tomatoes and raisins. Lock lid; close pressure-release valve. Adjust to pressure-cook on high for 6 minutes.
Quick-release pressure. A thermometer inserted in chicken should read at least 170°. Thicken cooking juices if desired. Serve with rice and if desired, parsley. Freeze option: Place chicken and vegetables in freezer containers; top with cooking juices. Cool and freeze. To use, partially thaw in refrigerator overnight. Heat through in a covered saucepan, stirring gently and adding a little broth if necessary.