White Bean Chili With Herbed Yogurt Cheese

Name: White Bean Chili With Herbed Yogurt Cheese
Ingredients: 3 cups dried navy or other white beans; 2 small poblano chile peppers; 1 tablespoon unsalted butter; 4 cloves garlic, minced; 1 onion, cut into 1/4-inch dice; 1 large carrot, cut into 1/4-inch dice; 2 stalks celery, cut into 1/4-inch dice; 1 teaspoon ground cumin; 1 teaspoon ground coriander; 1/2 teaspoon paprika; 1/4 teaspoon ground cayenne pepper (optional); 30 ounces homemade or canned low-sodium chicken stock, skimmed of fat; 8 cups water; 1 1/2 teaspoons coarse salt; 1/4 teaspoon freshly ground black pepper; 4 radishes, grated; Cilantro sprigs, for garnish; Herbed Yogurt Cheese