Fresh Raspberry Vinaigrette

Puree raspberries in a blender. Strain puree through a fine mesh sieve to separate seeds from the puree. To help this process along, I poured the puree into the strainer and stirred with a rubber spatula, pressing against the sides of the strainer. A spoon would also work just fine for stirring/pressing.

Return puree to the blender and add the vinegars, mustard, and salt. Blend on low until well mixed.

With the blender running, slowly drizzle in the oil. It is important to add the oil slowly so that an emulsion will be created, making a dressing that will not separate.

Chill for at least 2 hours for best flavor.