Make the sumac tahini. In a medium-sized bowl, combine the tahini, sumac, garlic, and lemon juice; add the water until you acquire desired consistency. Set aside or refrigerate until ready to use (you may need a little more water to thin out the sauce after it's been refrigerated).
Add all the salad ingredients to a large bowl. Add desired amount of tahini sauce, and toss to distribute evenly.
Lindsey S. Love is a food blogger living in Brooklyn, NY with her husband. Her cooking and baking focus on healthful gluten free and dairy free, with occasional vegan recipes. You can follow her at dollyandoatmeal.com for additional recipes.