Clean and wash the aubergine, zucchini, peppers and leek. Cut aubergine, zucchini, peppers into large cubes and leek into rings. Peel onions and cut into large cubes. Heat oil in a pot and fry onions briefly.
Add aubergine, zucchini, peppers and leek and steam. Stir in tomato pulp. Wash the mint, dab dry and chop coarsely, except for something to garnish. Season with salt, pepper, paprika, lemon juice and chopped mint.
Meanwhile bring 300 ml salted water to the boil, remove from the heat and stir in the couscous. Cover and allow to swell for approx. 5 minutes until all liquid has been absorbed. Loosen couscous with a fork and arrange on a plate.
Season the vegetable ragout if necessary and add it to the couscous. Serve garnished with mint leaves.