A further refinement is to make a herb-flavored fruit vinegar. I find raspberry vinegar makes a good background for summer herbs like tarragon, basil, and mint. Fill a jar with fresh raspberries and cover with white wine vinegar. Put on a tight-fitting lid and leave in a dark place at room temperature for 3 days. Strain off the vinegar and repeat the process using the strained vinegar but with a fresh batch of raspberries. Strain the vinegar into a bottle. The raspberry vinegar is now ready for use or for flavoring with herbs.