Cook tortellini according to package directions. Rinse under cold running water.
Place sugar snap peas in a small bowl; cover with plastic wrap. Microwave at HIGH 2 minutes. Let stand, covered, 2 minutes. Rinse under cold running water.
Thread each skewer with 1 sugar snap pea, 1 tortellini, and 1 tomato half. Place skewers in a 13- x 9-inch baking dish. Pour Mustard-Dill Vinaigrette over skewers, turning to coat. Cover and chill 4 hours. Transfer skewers to a serving platter; discard any remaining vinaigrette.
*1 (12-oz.) bottle light Champagne vinaigrette may be substituted. For testing purposes only, we used Girard's Light Champagne Dressing.