Bird's Nest Soup

• 2 egg whites
• 2 green onions
• 1 chicken breast
• 1,400 ml rich chicken stock for soup
• 60 ml rich chicken stock
• 30 ml rich chicken stock for paste
• 16 gr cornstarch
• 16 ml dry sherry
• 14 gr smithfield ham (minced)
• 3 gr salt