4 tablespoons tahini, divided
1 tablespoon lemon juice
3 teaspoons white miso, divided
1 ¼ teaspoons onion powder, divided
1 ¼ teaspoons garlic powder, divided
1 ¼ teaspoons ground pepper, divided
2 tablespoons water
1 teaspoon chopped fresh chives plus 2 tablespoons, divided
1 (15 ounce) can no-salt-added chickpeas, rinsed
1 teaspoon ground cumin
¼ teaspoon salt
¼ cup fresh parsley leaves
½ cup shredded zucchini
⅓ cup old-fashioned rolled oats
1 tablespoon extra-virgin olive oil
4 whole-grain hamburger buns, toasted
1 cup packed fresh arugula
4 slices tomato
