Slice tomatoes and arrange on plate. Sprinkle with salt and set aside.

Combine cheese, yogurt, buttermilk, vinegar, chives, salt and pepper in a jar. Cover tightly and shake until well blended. If you prefer a smoother dressing, mix all ingredients in a blender or food processor and blend until smooth. Transfer to a jar to store.

Drizzle dressing over tomatoes, and sprinkle with bacon.

Dressing will keep for up to a week in the refrigerator.