Two 15-ounce cans chickpeas, drained
2 cloves garlic, minced
1 1/2 teaspoons kosher salt
1/3 cup tahini, stirred well
5 tablespoons freshly squeezed lemon juice
1/4 cup extra-virgin olive oil, plus extra for service
Powdered sumac and/or cumin to taste, optional
Mediterranean sumac is not the same plant as American poison sumac.