Cauliflower Soup I

Ingredients

 * 3 cups Cauliflower, broken into florettes
 * 6 cups artificially flavored pareve chicken stock (hot)
 * 3 tablespoons butter
 * 3 tablespoons flour
 * 1/2 cup cream (or 1 cup half and half)
 * 3 egg yolks (can use 1 less)
 * 1/2 cup chopped onions

Directions
Cook onions in butter until soft.Stir in flour and cook 2 minutes. Stir in hot broth and bring to a boil, stirring. Add Cauliflower and simmer 30 minutes. Stir together egg yolks and cream and pour into hot soup. Bring almost to a boil. Serve.