pour water into a pan, add bouillon cube and bring to a boil. Prepare couscous in a soup plate or bowl and as soon as the water starts boiling pour it over the couscous. Cover the plate/bowl and let soak for 5 to 10 minutes. Remove lid and let cool down at room temperature.
rinse off scallions and slice them.
rinse off tomato and cut into small pieces.
add all the ingredients (except the pointed peppers) to the couscous and mix.
rinse off pointed bell peppers, pat dry, cut them in half and remove the seeds. Fill the peppers with the couscous mixture.
put on the grill immediately for 20 minutes.