Peel the shrimps, except for the tail fin, and remove the intestines. Then wash and pat dry. Wash and clean the zucchini and cut into diamond-shaped pieces. Wash the tomatoes and cut them into not too small pieces.
Peel and finely dice the onion and garlic. Heat 2 tablespoons of oil in a frying pan and fry the zucchini in it while turning. Season with salt and remove from the pan. Put 1 tablespoon of oil in the same pan, add onions, garlic and prawns and fry for about 2 minutes, turning.
Season prawns with salt, pepper and 2 tablespoons lemon juice. Add tomatoes and cook on medium heat for 2-3 minutes, add zucchini and keep warm. Bring 1/4 litre of water, 1 tbsp. oil and 1 tsp. salt to the boil.
Remove from heat, stir in the couscous and let it swell for about 3 minutes. Add butter and place on the stove again briefly at low heat. Loosen with a fork. Wash the dill, dab dry and pluck finely.
Mix prawns, vegetables and couscous and season to taste with salt, pepper, turmeric, chilli, cumin and remaining lemon juice, fold in dill.