Balsamic Chicken with Thyme

Source: Woman's Day magazine, 2/1/1999

5 boneless, skinless chicken breast halves
1/2 cup flour
3/4 tsp each salt and pepper
Olive oil for the pan
1 large sweet onion, sliced thin
1 cup chicken broth
2 tbl balsamic vinegar
1/2 tsp dried thyme

Mix flour, salt and pepper.
Dredge chicken in flour mixture.
Saute chicken in oil, in a heavy skillet. Remove to a plate and keep warm.
Saute onion slices in the same skillet for a couple of minutes. When they begin to wilt, add remaining ingredients and cook until sauce boils and becomes syrupy. Pour over chicken and serve.