The best quality balsamic vinegar can be over 100 years old but is more commonly sold at three to four years of age. True balsamic vinegars are very expensive but have an exceptional flavour.
3. When onion has softened, add sake, 2 Tbsp water and balsamic vinegar (PHOTO C). When sauce comes to a boil, turn chicken again. When sauce is reduced to about a quarter, add butter, turn off ...