In 3-quart saucepan, heat 6 cups water to boiling over high heat. Add beans to boiling water. Cook 4 to 6 minutes or until crisp-tender; drain. Rinse with cold water; drain. Cover; refrigerate while making dip.
In medium bowl, beat remaining ingredients except peanuts with wire whisk until smooth. Cover; refrigerate at least 30 minutes to blend flavors. Stir before serving. Garnish with peanuts. Serve beans with dip.