1/3 cup flour
2 tbsp. chopped parsley
2 tbsp. balsamic vinegar
2/3 cup Marsala wine
2 tbsp. water
1 tsp. corn starch
1/2 cup chicken stock
3 garlic cloves, minced
1 cup diced onions
3 tbsp. olive oil
8 oz. mushrooms
1 1/2 pounds thin cut chicken breasts