1. Heat oil in a large saucepan over medium-high heat. Add onion and leek; sauté 5 minutes. Add coriander and next 4 ingredients (through garlic); cook 1 minute, stirring constantly. Add 3 cups Simple Vegetable Stock and the next 8 ingredients (through chickpeas); bring to a boil. Cover, reduce heat, and simmer 30 minutes. Stir in parsley and honey.
2. Remove 2/3 cup hot cooking liquid from squash mixture. Place cooking liquid and remaining 2/3 cup stock in a medium bowl. Stir in couscous. Cover and let stand 5 minutes. Fluff with a fork. Serve with lemon wedges.