ut tomatoes into wedges or halves, season with salt and pepper and place in a metal bowl in the freezer for 15 minutes.
Add all remaining ingredients in a blender and blend on high speed until smooth. Strain dressing into a small bowl and chill for a few minutes.
Remove tomatoes from freezer and douse with chilled buttermilk dressing to taste. Add additional cayenne, salt and pepper to taste. Plate and enjoy.
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