Classic Chicken Salad from 'The Artisan Jewish Deli at Home'

Ingredients (8)

• 1 pound boneless, skinless chicken breasts, trimmed of fat
• 2 tablespoons plus 1/2 teaspoon kosher salt
• 1/4 medium yellow or white onion, minced
• 2 celery stalks with leaves, leaves chopped and ribs cut into 1/4-inch dice
• 3 tablespoons mayonnaise
• 1/2 to 1 teaspoon prepared horseradish
• 1/8 teaspoon freshly ground black pepper
• Juice of 1 small lemon