• Make-Ahead

Ingredients

1. 1/4 cup plus 1 tablespoon extra-virgin olive oil
2. One 4-pound chicken, cut into 8 pieces
3. Salt and freshly ground pepper
4. 1 large onion, coarsely chopped
5. 1 teaspoon ground ginger
6. 1 teaspoon ground cinnamon
7. 3/4 pound white or yellow sweet potatoes, peeled and sliced crosswise 1/8 inch thick
8. 2 large tomatoes, finely chopped
9. 2 garlic cloves, minced
10. 1 tablespoon chopped parsley
11. 1/2 cup water

Directions

1. In a large enameled cast-iron casserole, heat 2 tablespoons of the olive oil. Season the chicken with salt and pepper and cook over moderately high heat until lightly browned, about 3 minutes per side. Transfer the chicken to a plate.
2. Add the remaining 3 tablespoons of olive oil to the casserole along with the onion, ginger, cinnamon and 1 teaspoon of freshly ground pepper. Cook over low heat, stirring occasionally, until the onion is softened, about 7 minutes. Arrange the chicken pieces in the casserole in an even layer. Spread the sweet potato slices over the chicken and season with salt and pepper. Sprinkle evenly with the tomatoes, garlic and parsley. Add the water to the casserole and bring to a simmer. Cover and cook the tagine over low heat until the chicken and sweet potatoes are tender, about 50 minutes.
3. Using a spatula, carefully transfer the sweet potatoes to a large bowl. Add the chicken pieces to the bowl and keep warm. Boil the sauce over high heat until slightly thickened, about 5 minutes. Season with salt and pepper. Pour the sauce over the chicken and sweet potatoes and serve.

Make Ahead

The tagine can be prepared through Step 2 and refrigerated for up to 3 days. Bring to room temperature before reheating gently.