½ cup chopped onion 1 tablespoon tomato paste ½ teaspoon cumin seeds 1 tablespoon vegetable oil ¾ cup long grain white rice 1 14.5 ounce can reduced-sodium chicken broth 1 teaspoon kosher salt 1 15 ounce can pinto beans, rinsed and drained ¼ cup snipped fresh cilantro