Spray a large nonstick skillet with cooking spray and set it over medium heat. Add the eggs and cook, stirring with a spatula almost constantly, until the eggs are scrambled, 2 to 3 minutes. Remove to a small plate and wipe out the skillet. Raise the heat to medium-high, add the sesame oil, and swirl to coat. Add the broccoli slaw, ginger, and garlic, and cook, stirring frequently, until slightly softened, about 4 minutes. Add the couscous and cook, stirring occasionally, for 3 minutes. The pan will seem dry but you want the couscous to brown and get a little crispy.