Cut chicken lengthwise into 1-inch-wide strips. Combine ginger and next 3 ingredients. Sprinkle evenly over chicken; set aside.
Coat a large nonstick skillet with cooking spray; add oil, and place over medium-high heat until hot. Add chicken and garlic; cook 3 minutes or until chicken is lightly browned. Add broth and peas; bring to a boil. Reduce heat, and simmer 2 minutes or until chicken is done. Stir in couscous; cover and remove from heat. Let stand 5 minutes or until liquid is absorbed. Sprinkle with cilantro.