Pour the pizza tomatoes through a sieve and collect the juice. Strain the tomato juice with about 150 ml of water and bring to the boil. Simmer the couscous in it for about 5 minutes, then let it steep for another 5 minutes.
Fry the onions in olive oil, then add the broccoli. After about 5 minutes, add the drained tomatoes to the pan and cook the broccoli in it. If necessary, add a little more water.
When the broccoli is done, add the couscous and season with salt, pepper and the herbs. The dish can be served straight away or seared a little more as you like.