Arrange the shrimp and scallops on a plate in a steamer basket. Sprinkle with 1 teaspoon each orange juice and rice vinegar. Place steamer over boiling water in a wok or large skillet and cover. Cook 7 to 8 minutes until shrimp are cooked through. Stir remaining orange juice, rice vinegar, sesame oil, mustard, salt and pepper in a medium bowl. Mix in scallion, dill and chives. Transfer hot seafood to bowl with vinaigrette; toss to coat well. Serve warm on lettuce lined plates. Makes 4 servings Nutrient value per serving: 116 calories - 14 g protein - 4 g fat 4 g carbohydrate 395 mg sodium - 66 mg cholesterol fish 2