Vietnamese Noodle Soup

INGREDIENTS

• Kosher salt and freshly ground pepper
• 4 scallions
• 1 cinnamon stick
• 3 cups low-sodium beef broth
• 1 large onion, halved
• 2 jalapeno peppers, preferably red and green
• 1 4-inch piece ginger, unpeeled, halved
• 1 cup fresh bean sprouts
• 2 to 4 tablespoons fish sauce
• 1/2 cup fresh cilantro
• 8 ounces rice noodles
• 12 ounces lean beef sirloin, fat trimmed
• 5 star anise pods