Unceremoniously dump the cup of raspberries in the food processor and whiz until liquidy.
Optional step: strain the puree through some cheesecloth or through a sieve to remove the seeds. Not necessary, but it does make the dressing easier to pour and avoids those little seeds between the teeth thing that everyone tries to ignore
Add the raspberries back into the processor once strained if you did that.
Blend together the raspberries with all the other ingredients. Done!