Ginger Sweet Potato and Coconut Milk Stew with Lentils and Kale

Name: Ginger Sweet Potato and Coconut Milk Stew with Lentils and Kale
Prep time: 20 min
Cook time: 45 min
Total time: 1 h 5 min
Cuisine: American, Asian
Ingredients: 1 tablespoon coconut oil; 1 medium yellow onion, small dice; ½-1 teaspoon dried chili flakes; ½ teaspoon ground coriander; ½ teaspoon ground cumin; ½ teaspoon ground turmeric; 2-inch piece fresh ginger, peeled and minced; 3 cloves garlic, peeled and minced; salt and ground black pepper, to taste; 1 ½ lbs (690 grams) sweet potatoes, peeled and diced into 1-inch pieces; ½ cup dry brown lentils, picked over; 4 cups vegetable stock; 13.5 oz (400 ml) can full fat coconut milk; 1 bunch kale, stems removed and leaves chopped (about 4 packed cups of chopped kale); To garnish: chopped cilantro, extra chili flakes, lime wedges, nigella seeds