Argrodolce translates to sour and sweet in Italian and is a deliciously sticky, tangy and sweet sauce with multiple purposes. This sauce could also be called a gastrique if using the French term. Combining sugar and honey with vinegar and other flavorings, agrodolces can be on the lighter side as in this version for a hearty fish such as a swordfish steak or plummy with raisins and dried fruit, which makes a lovely condiment for sandwiches.
Here we use lemon verbena, a delicate herb with a lightly sweet lemon aroma, along with lemon juice and zest. The lemon verbena leaves are used whole to showcase their lovely oblong shape. Champagne vinegar adds a sophisticated tang to the sauce, which is even light enough for a more delicate fish like flounder