balsamic chicken

This great recipe comes from my friend Erin.

balsamic chicken (my friend Erin K.)
4 chicken breasts (I filleted mine)
salt/pepper
3/4 pound sliced mushrooms (I didn't have any)
2 tablespoons flour
2 tablespoons olive oil
6 cloves garlic
1/4 cup balsamic vinegar
3/4 cup chicken broth
1 bay leaf
1/4 teaspoon thyme
1 tablespoon butter

Season chicken with salt and pepper.  Season flour with salt and pepper and dredge chicken in mixture.  Heat oil in a skillet over medium high heat and saute the chicken until brown on one side.  Add the garlic.  Turn chicken and add mushrooms.  Cook for 3 minutes more then add vinegar, broth, bay leaf and thyme.  Cover and simmer for 10 minutes.  Remove chicken; keep warm.  Continue simmering the sauce uncovered for 7 minutes.  Swirl in butter; discard bay leaf.  Pour sauce over chicken and serve.