Built around fall veggies and an intriguing, spicy sauce, this dish needs only quick-cooking couscous to soak up all the goodness. Authentic harissa instead of chili flakes and garlic, substitute 1/2 tsp (2 ml) harissa, a fiery tunisian chili sauce popular in north africa. Generously laced with coriander, garlic, cumin, mint and caraway seeds, this.