Cleaned of scales and giblets fish (head, tail, and fins do not need to be cut off), smear with spices and sprinkle with lemon juice. Close and put in a cool place for at least 1 hour to marinate. Mostly I do it before going to bed, and the next day I cook for dinner.
If you use other seasonings for fish, you can replace them. I use this compound very often.Before cooking, pour the couscous with hot water, cover with a lid and leave for 5-7 minutes. It will absorb all the water, but even if it doesn't, drain the excess liquid.
Add all the spices and mix.