Green Goddess Dressing

2 tsp (10 mL) tarragon vinegar, 2 tsp (10 mL) minced anchovies, ¼ cup (60 mL) minced scallions, 2 tbsp (30 mL) minced parsley, 1 tbsp (15 mL) minced tarragon, 1 tbsp (15 mL) minced chives, 2 fl oz (60 mL) heavy cream