Greek Lemon Chicken Soup

• 8 egg yolks
• 6 concentrated chi soup base
• 1 pepper (freshly ground white)
• 1,900 ml chicken broth
• 140 gr chicken (diced cooked)
• 120 ml lemon juice (fresh)
• 120 gr long rice (cooked grain)
• 95 gr carrot (shredded)
• 60 gr onion (chopped)
• 55 gr butter