1. Combine first 8 ingredients; gradually whisk in 3 tablespoons oil.
2. Heat remaining 1 tablespoon oil in a large skillet over medium-high heat. Add shrimp; cook 2 minutes. Add juice mixture; cook 1 minute. Stir in asparagus. Place romaine in a large bowl; toss with shrimp mixture. Divide salad among 4 plates; top each with 1/4 cup watercress.
MyRecipes is working with Let's Move!, the Partnership for a Healthier America, and USDA's MyPlate to give anyone looking for healthier options access to a trove of recipes that will help them create healthy, tasty plates. For more information about creating a healthy plate, visit www.choosemyplate.gov.