Preheat oven to 180°C. Spray a baking tray with nonstick cooking spray. Arrange chicken on tray. Rub chicken with ½ teaspoon ginger; sprinkle with 1/8 teaspoon salt and ¼ teaspoon pepper. Roast for 12 to 15 minutes or until chicken is cooked.
Meanwhile, with a knife, cut peel and white pith from orange; discard. Cut on either side of membrane to remove each segment from orange; place half the segments in a medium pot. Squeeze juice from membranes into the pot.
To the same pot, add celery, spring onions, vinegar, remaining ¼ teaspoon ginger and 1/8 teaspoon salt. Heat to boiling on high. Reduce heat to simmer; cook for 7 minutes or until celery is crisp-tender, stirring occasionally. Remove from heat; stir in coriander and reserved orange segments.
Cook the couscous according to the instructions on the label. Serve the chicken with relish and couscous.
EACH SERVING About 1 339kJ, 30g protein, 45g carbohydrate, 3g total fat (1g saturated), 8g fi bre, 63mg cholesterol, 245mg sodium.