Grilled Shrimp and Vegetable Kebabs for Two

Name: Grilled Shrimp and Vegetable Kebabs for Two
Ingredients: Salt and pepper; 1 tablespoon sugar; 12 ounces jumbo shrimp (16 to 20 per pound), peeled and deveined; 1 1/2 large red or yellow bell peppers , stemmed, seeded, and cut into ¾-inch-wide by 3-inch-long strips; 12 cremini mushrooms , trimmed; 6 scallions , cut into 3-inch lengths; 1 tablespoon vegetable oil; 2 tablespoons lemon juice; 2 tablespoons extra-virgin olive oil; 1 teaspoon minced fresh thyme; 1/2 teaspoon minced garlic; 1/4 teaspoon salt; 1/8 teaspoon Dijon mustard; Pinch pepper