Harissa Sweet Potato and Chickpea Stew Recipe

Name: Harissa Sweet Potato and Chickpea Stew Recipe
Ingredients: 2 tablespoons olive oil; 1 yellow onion, diced; 4 cloves garlic, minced; 1 tablespoon minced fresh ginger; 1 teaspoon ground cinnamon; 1 teaspoon ground coriander; 1 teaspoon ground cumin; 1 ½ teaspoons salt; ½ teaspoon ground black pepper; 2 tablespoons harissa paste; 1 (28-ounce) can diced tomatoes; 3 cups vegetable stock; 3 cups diced sweet potatoes (½-inch cubes); 1 (19-ounce) can chickpeas, drained; 2 cups roughly chopped kale; ½ cup sour cream, for garnish; ¼ cup roasted pumpkin seeds, for garnish