Make this recipe a recipe that people in that category can eat. categories: ['dairy_free'], recipe: in a blender or food processor, whirl all the ingredients except the buttermilk for one minute. with the blender running, slowly pour in the buttermilk and blend until thick and creamy (turn off the blender as soon as the dressing thickens or it may curdle). chill at least 1 hour so the flavours meld. refrigerate, tightly covered. this makes nearly 2 cups of dressing and stays fresh for 3-4 days. if the dressing separates, just give it a whizz in the blender again.

Target recipe: to make dressing, place the garlic, vinegar, salt, black pepper and cayenne in a blender or food processor fitted with a metal blade. whirl until blended. continuing to whirl, gradually add the oil, drop by drop at first, then in a thinly steady stream. the dressing will thicken. continuing to whirl, add the anchovies or anchovy paste. taste and add more salt, if needed. the dressing can be used right away or covered and left at room temperature. if making the dressing more than 1 day ahead, cover and refrigerate.