In a medium bowl, combine tahini, lemon juice, lemon zest, minced garlic, and olive oil. Stir until well blended. The mixture may appear thick and lumpy at first, but keep stirring, it will become smooth.
Gradually add water, a little at a time, while stirring continuously, until you achieve your desired consistency. You might not need the entire 1/2 cup, or you may need slightly more.
Stir in the chopped herbs: parsley, basil, and dill. Mix well to evenly distribute the herbs throughout the dressing.
Season with salt and pepper to your liking.
Taste and adjust seasoning if necessary, adding more salt, pepper, or lemon juice as needed.
Your Lemon Herb Tahini Dressing is ready! Serve it immediately or store it in an airtight container in the fridge for up to a week.