Ingredients
2 yellow onions, about 1 pound total, unpeeled
Chubby 4-inch section fresh ginger, unpeeled
1 chicken, 4 pounds, excess fat and tail removed
3 pounds chicken backs, necks, or other bony chicken parts
5 quarts water
1 1/2 tablespoons salt
3 tablespoons fish sauce
1-inch chunk rock sugar (about 1 ounce; see Notes)
2 tablespoons coriander seeds, toasted in a dry skillet for about 1 minute until fragrant
4 whole cloves
1 small or 1/2 large bunch cilantro (bound stems about 1 inch in diameter)
1 1/2–2 pounds small flat rice noodles
Cooked chicken, at room temperature
1 yellow onion, sliced paper-thin, soaked in cold water for 30 minutes and drained
3 or 4 scallions, green part only, thinly sliced
1/3 cup chopped fresh cilantro, leafy tops only
Black pepper
3 cups bean sprouts (about 1/2 pound)
10 to 12 sprigs mint (húng) 10 to 12 sprigs Thai basil (húng quế)
12 to 15 fresh culantro
2 or 3 Thai or serrano chiles, thinly sliced
2 or 3 limes, cut into wedges