In a large mixing bowl, combine the lean beef or lamb mince, grated onion, crushed garlic, dried chili flakes, dukkah, ground cumin, salt, and pepper. Mix all the ingredients thoroughly with your hands until well combined, then shape the mixture into walnut-sized meatballs, ensuring they are tightly packed for even cooking. This step may take about 10 minutes.

Heat a generous drizzle of olive oil in a non-stick frying pan over medium heat. Once the oil is shimmering, carefully add the meatballs in batches, ensuring they are not overcrowded. Cook for about 5-6 minutes, turning occasionally, until they are browned on all sides. Once browned, transfer the meatballs to a plate and keep warm while preserving any remaining oil in the pan.

In the same pan, add a bit more olive oil if needed, and sauté a chopped onion and a few crushed garlic cloves over medium heat. Stir continuously for about 3-4 minutes until soft and translucent. Then, incorporate the ground cumin, cinnamon, and a pinch of chili flakes. Allow these spices to cook for about 1-2 minutes until fragrant, releasing their robust aromas.

Pour in the canned chopped tomatoes and the chicken or lamb stock, bringing the mixture to a rolling boil over high heat. Once boiling, gently return the browned meatballs to the sauce, ensuring they are fully submerged. Reduce the heat to low, cover, and let it simmer for 8-10 minutes, or until the meatballs are cooked through and the sauce has thickened slightly.

While the sauce is simmering, place the couscous in a heatproof bowl and drizzle with a splash of olive oil for extra flavor. Carefully pour the boiling stock over the couscous, ensuring it's fully covered. Immediately cover the bowl with a lid or plastic wrap, letting it sit for 5 minutes to cook. After this time, fluff the couscous with a fork and stir in freshly chopped parsley for a burst of freshness.

To serve, create a bed of fluffy herb couscous on each plate. Spoon the delicious, simmered Moroccan meatballs along with the rich sauce over the couscous. Finish with a sprinkle of chopped fresh coriander or cilantro on top to add brightness and an inviting presentation. Enjoy this delightful meal with your loved ones!