Spiced Chicken Broth with Chive Flans

PreparationMake Broth: Bring all broth ingredients to a boil with 2 teaspoons salt in an 8-to 10-quarts heavy pot and skim foam. Gently simmer, uncovered, skimming occasionally, 4 hours. Strain broth through a fine-mesh sieve lined with a damp paper towel into a large bowl, discarding solids. Skim off and discard any fat. Season with salt and pepper. Meanwhile, make flans: Preheat oven to 350°F with rack in middle. Simmer chives and half-and-half in a small heavy saucepan 5 minutes, then let stand, covered, 15 minutes. Whisk together egg and yolk, 1/4 teaspoon salt, and 1/8 teaspoon pepper in a 2-cup measure, then whisk in chive mixture until blended. Put mold on a rack in a roasting pan and put 1 teaspoon chive mixture in each cup (if using mini-muffin pans, fill only 16 cups; about 1 tablespoon per cup). You will have mixture left over. Bake in a water bath until flan is just set, 8 to 10 minutes (10 to 12 if using muffin pans). Carefully remove mold from water bath. Cool flans at room temperature, then chill until cold, at least 1 hour. To serve: Run a thin knife around flans to loosen. Invert mold onto a baking sheet and, pressing gently, pop out flans (or lift out of muffin pans with a small offset spatula). Carefully transfer flans to 8 shallow bowls and ladle in hot broth. Cooks’ notes:•Broth can be made 1 week ahead and chilled (covered once cool) or frozen 1 month. Discard solidified fat. •Flans can be chilled up to 1 day.