Sweet Potato and Chickpea Masala
1 (1 inch) piece fresh ginger, peeled and cho… 1 (15 ounce) can chickpeas (garbanzo beans), … 1 cup water, or more as needed 1 onion, diced 1 tablespoon chopped fresh cilantro 1 tablespoon ghee (clarified butter) 1 tablespoon vegetable oil 1 teaspoon chili powder 1 teaspoon curry powder 1 teaspoon ground coriander 1 teaspoon ground cumin 1 teaspoon salt, or to taste 2 cloves garlic, minced 2 large sweet potatoes, peeled and diced 2 tomatoes, chopped water as needed ½ teaspoon garam masala ½ teaspoon ground turmeric