2. Sauté the minced onion in a tablespoon of olive oil.
When it becomes translucent, add the zucchini and eggplant.
Stir to mix the ingredients well. Cook over medium heat, covered, for 3-4 minutes, then add the tomatoes and stir again.
Continue cooking for about 5 minutes, then add the salt, pepper, and spices (to taste).
Stir well.
Cook uncovered for another 5 to 10 minutes over medium heat, stirring occasionally.