Try this homemade Vegetable Gratin Recipe cosmopolita recipe the whole family will love. Made with roma tomatoes, potatoes, bell peppers and zucchini. E…
This Vegetable Gratin Recipe cosmopolita relies on simple, everyday ingredients such as roma tomatoes, or 5 potatoes, bell peppers and medium zucchini. It comes together quickly and makes 4 servings, at about 594 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.
It's versatile enough for an easy weeknight dinner yet satisfying enough for guests at the weekend. Serve it with your favorite sides, and keep any leftovers for a quick meal the next day.
Updated Jun 30, 2026