Add fresh raspberries, honey and vinegar to a blender jar. Seal with lid and start blender on low and slowly increase it to high. Let the blender run on high for 30 seconds.
Lower speed to medium. While blender is going, remove lid and slowly drizzle in the oil to allow the vinaigrette to emulsify.
Drizzle the vinaigrette on a salad. Store any extra in a sealed container in the fridge for a few days.