Drizzle this blackberry vinaigrette over mixed-greens for an elegant and unique flavor combination.
Process blackberries in a blender until smooth. Strain berries through a sieve into a bowl, and discard solids.
Process berry puree, shallot, and next 4 ingredients in a blender for 30 seconds. With blender running, pour oil through food chute in a slow, steady stream, and process until smooth.