1. Place first 5 ingredients in a medium saucepan. Bring to a boil; reduce heat, and simmer, uncovered, 3 minutes. Remove from heat; cool slightly.
2. Strain mixture through a sieve into a bowl, reserving liquid and solids. Place solids in a blender; process until smooth.
3. Combine pureed mixture and liquid. Stir in lemon juice. Cover and refrigerate 1 hour or until thoroughly chilled. Serve over ice.