2 (15-oz.) cans unsalted diced tomatoes divided 2 (15-oz.) cans unsalted chickpeas, rinsed and drained 1 1/2 tablespoons extra-virgin olive oil, divided 1 tablespoon minced garlic 1 teaspoon kosher salt, divided 1 cup chopped red onion 1 cup chopped red bell pepper 1 large zucchini, cut into 1-i