Yield: 4 Servings
|1 cup||Balsamic vinegar|
|4||Cl Garlic; sliced|
|4 pinches||(2-inch) fresh rosemary|
|2 tablespoons||Butter; optional|
Put all the ingredients except the butter into a saucepan and bring to a boil. Reduce the heat and simmer until it is reduced by half, about 10 minutes. The sauce is ready when it coats the back of a spoon. Add the optional butter and stir well.