Prepare the couscous, fry the onion and garlic in olive oil until slightly golden, stir in spices and harisa, cover with measured water needed for couscous, bring to the boil. Remove from heat, stir in the couscous, cover and allow resting. Break with a fork before serving and correct seasoning. Alternate layers of grilled vegetables and couscous into desired moulds, pressing gently to secure. Cook the straccietti in the last minute; slice the beef fillet into 5 mm slices. Preheat a frying pan with olive oil, crushed skin on garlic and rosemary. Quickly sear the meat on for 1 minute on both sides, drizzle with balsamic vinegar and a little stock. Remove the meat and allow the sauce to thicken slightly. To serve, slightly warm the couscous-vegetable timbale. Dress the meat around it and dress with the obtained sauce. Sprinkle with pine nuts, rocket leaves and grana shavings.