2 tablespoons apple cider vinegar (must be this type)
1 teaspoon salt
1 tablespoon prepared mustard
1 1-inch thick slice of onion, quartered
3/4 cup oil
2 teaspoons poppy seeds
Combine first five ingredients in blender, process until well blended. With blender running on high, remove center portion of lid and slowly add oil. Add poppy seeds last and blend only until mixed (or the blender cuts them up). Make dressing 24 hours in advance to allow flavors to blend. Let stand at room temperature for an hour before using (it gets very thick while refrigerated).