Bring chicken broth, 1 tablespoon oil, ginger, garlic, 1 teaspoon salt, turmeric, cinnamon, and cumin to boil in heavy large saucepan. Stir in couscous and remove from heat. Scatter raisins over, cover, and let stand until couscous softens, about 10 minutes. Fluff couscous with fork, breaking up any lumps with fingertips. Transfer couscous to large bowl. Add cucumber, red bell pepper, carrot, green beans, and lemon peel. Whisk remaining 1 tablespoon oil, 1 teaspoon salt, and lemon juice in small bowl. Add to couscous; toss to coat. Season to taste with salt and pepper. DO AHEAD: Can be made 1 day ahead. Cover and chill. Bring to room temperature before serving.
Place 2 1/2 tablespoons oil, lemon juice, 1/2 teaspoon salt, and 1/2 teaspoon pepper in large resealable plastic bag. Add chicken and seal bag, releasing any excess air; turn several times to coat. Let stand at room temperature 30 minutes. Alternatively, chill 1 to 3 hours and bring to room temperature before continuing.
Prepare barbecue (high heat). Brush grill rack with oil. Transfer chicken from bag to barbecue with some marinade still clinging and grill until slightly charred and just cooked through, about 4 minutes per side. Transfer chicken to platter and let rest 10 minutes. Stir 3/4 cup chopped cilantro into couscous. Sprinkle almonds over, if desired. Drizzle chicken with oil, sprinkle remaining 1/3 cup chopped cilantro over, and garnish with lemon wedges. Serve with couscous.