Heat a large nonstick skillet coated with cooking spray over medium-high heat. Combine 1/2 teaspoon salt, garlic, and chicken, tossing to coat. Add chicken mixture to pan; saute 3 minutes or until browned. Stir in curry powder; cook 1 minute. Add tomato, broth, chile sauce, and chickpeas; bring to a simmer. Cover and cook 8 minutes.
While chicken mixture cooks, place 1/4 teaspoon salt, 1 cup water, and oil in a medium saucepan; bring to a boil. Gradually stir in couscous; remove from heat. Cover and let stand for 5 minutes. Fluff couscous with a fork.
While couscous stands, poke holes in spinach bag. Microwave at high 2 minutes. Garnish with lemon wedges, if desired.