Combine vinegar, oil, tahini, honey, and garlic in a blender, a jar with a tight-fitting lid, or a medium bowl. Blend, shake, or whisk until smooth. Season with salt and pepper. If the dressing is too thick, add water 1 tablespoon at a time, blending after each addition to see if it’s the correct consistency.
The dressing will thicken as it stands, or after refrigerating, so thin as needed with additional water. Store in the fridge in a jar with a tight-fitting lid. Btw, this makes way more than you'll need for this little salad.