Directions

1. Heat oil in a medium saucepan over medium heat until hot but not smoking. Add onion and garlic; cook, stirring occasionally, until softened, 3 to 5 minutes. Stir in ginger, cinnamon, cumin, and 1/2 teaspoon each salt and pepper; cook 1 minute. Add squash and tomato paste; cook 3 minutes more.
2. Stir in broth and zest; simmer until squash is tender and sauce is thickened, 12 to 15 minutes. Season with salt and pepper.
3. Meanwhile, bring 1 1/2 cups water to a boil with 1/4 teaspoon salt. Put couscous and raisins in a glass bowl; pour in boiling water. Cover tightly with plastic wrap; let stand 5 minutes. Uncover; fluff with a fork. Serve couscous with squash and sauce.