Cream of Broccoli Soup

Steps

• 1

  Melt butter in 3-quart saucepan over medium heat. Cook onion and carrots in butter about 5 minutes, stirring occasionally, until onion is tender. Stir in mustard seed, salt and pepper. Stir in broccoli, broth and water. Heat to boiling; reduce heat. Cover and simmer about 10 minutes or until broccoli is tender.
• 2

  Place one-third of the broccoli mixture in blender. Cover and blend on high speed until smooth; pour into bowl. Continue to blend in small batches until all soup is pureed.
• 3

  Return blended mixture to saucepan. Stir in lemon juice. Heat over low heat just until hot. Stir in sour cream.