Bring broth, 1 tbsp. olive oil, ginger, garlic, 1 tsp. salt, turmeric, cinnamon, and cumin to boil in saucepan. Pour broth mixture into a large bowl and add couscous.--Scatter raisins over, cover, and let stand until couscous softens, about 10 minutes. Fluff couscous with fork, breaking up any lumps.-- Add red bell pepper, carrots, green beans, and lemon peel.--Whisk remaining tbsp. of olive oil and tsp. salt with the 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. Can be eaten chilled or at room temperature