1. Sauté 1 onion and 1 clove of garlic in a little olive oil.
2. Add drained chickpeas, tomatoes and their juice, tuna and its juice. Stir well. Add salt, pepper, chili (to taste), minced basil.
3. Wash unpeeled zucchini and slice them thinly. Add them to the mixture.
4. Cook everything uncovered, stirring occasionally.
5. The zucchini should cook in the tomato and tuna water for about 20 minutes and become very tender. Adjust the seasoning if necessary.
6. Serve hot when most of the cooking liquid has evaporated.