| 4 to 5 tablespoons coriander seeds |
| 2 teaspoons minced fresh ginger |
| 3 quarts or six 13 3/4-ounce cans chicken stock |
| 1/2 teaspoon freshly ground black pepper |
| 2 tablespoons granulated sugar (optional) |
| 2 tablespoons freshly squeezed lemon juice |
| 1/2 cup chopped fresh mint |
| 1 cup plain yogurt or creme fraiche, for garnish |