COOK and stir bacon in large skillet on medium-high heat 1 min. Add onions and mushrooms; cook 9 min., stirring occasionally. Remove from skillet; set aside.
ADD chicken to skillet; cook 2 to 3 min. on each side or until browned on both sides. Mix dressing and flour; pour over chicken. Stir in tomatoes and bay leaves. Bring to boil on high heat; simmer on medium-high 10 min., stirring occasionally.
STIR in bacon mixture; simmer on medium 15 min., stirring occasionally. Remove and discard bay leaves. Sprinkle chicken mixture with parsley.