Combine the first 6 ingredients in a medium saucepan, and bring to a boil. Cook 5 minutes. Add shrimp, and cook for 3 minutes or until shrimp are done. Drain liquid, discarding solids. Peel and devein shrimp.
Steam snow peas, covered, 3 minutes or until tender. Combine shrimp, snow peas, chives, and Tarragon Dressing in a large bowl. Serve on endive-lined plates.