Garlic Soup

Directions

1. 1
   Separate garlic head into cloves.
2. 2
   Smash cloves with flat side of a heavy knife and peel them.
3. 3
   In a 2-quart saucepan bring water, garlic, bay leaf, and thyme to a boil and simmer, covered, 45 minutes.
4. 4
   Discard bay leaf and thyme sprigs and force mixture through a sieve into another saucepan.
5. 5
   In a large bowl whisk together yolks, Parmesan, and 2 tablespoons oil until combined well.
6. 6
   Add 1/2 cup hot garlic broth to yolk mixture in a slow stream, whisking, and whisk yolk mixture into remaining hot garlic broth.
7. 7
   Cook soup over moderately low heat, whisking constantly, until slightly thickened and a thermometer registers 170F.
8. 8
   (do not let boil), about 10 minutes.
9. 9
   Tear bread into pieces and divide among 4 soup bowls.
10. 10
    Ladle soup over bread and drizzle with remaining tablespoon oil.