How to Make It
Whisk together oil, zest, juice, salt, and pepper in a small bowl. Set aside.
Prepare orzo according to package directions, omitting salt and fat; drain. Transfer orzo to a bowl, and cool to room temperature, about 10 minutes.
While orzo cooks, bring a large saucepan of water to a boil over high. Add asparagus and sugar snap peas to boiling water. Cook until bright green and tender-crisp, about 2 minutes. Add English peas, and stir until softened, about 30 seconds. Using a slotted spoon, transfer vegetables to an ice bath, reserving boiling water in saucepan.
Add shrimp to boiling water. Cook until opaque, about 3 minutes, and then drain. Transfer shrimp to ice bath with vegetables. Let stand until chilled, about 3 minutes; drain.
Toss together shrimp-vegetable mixture with orzo; drizzle with dressing. Add chives, parsley, and tarragon, and toss to combine. Serve at room temperature or chilled.