Chicken Breasts with Balsamic Vinegar

INGREDIENTS

• 4 skinless, boneless chicken breasts
• salt and pepper to taste
• 3/4 pound fresh mushrooms, sliced
• 2 tablespoons all-purpose flour
• 2 tablespoons olive oil
• 6 cloves garlic
• 1/4 cup balsamic vinegar
• 3/4 cup chicken broth
• 1 bay leaf
• 1/4 teaspoon dried thyme
• 1 tablespoon butter