Citrus Grilled Shrimp over Greens

Name: Citrus Grilled Shrimp over Greens
Ingredients: 1 pound large raw shrimp, peeled and deveined (leave tail on for presentation); 1/2 cup orange juice; 1 tablespoon lime juice; 2 teaspoons olive oil; 2 teaspoons Dijon mustard; 1/2 teaspoon finely grated lime zest from 1 lime, reserve lime; 1/2 teaspoon salt; 1/4 teaspoon ground black pepper; Metal or wooden skewers; 2 teaspoons fresh thyme leaves; 2 teaspoons chopped fresh chives; 6 cups mixed lettuces (any combination Romaine, Bibb, endive, or baby greens); 1 cup halved cherry tomatoes