Vegetable gratin is a baked dish that features layers of vegetables, often combined with a creamy sauce and topped with cheese. Common vegetables used include zucchini, potatoes, and carrots, which are sliced thinly to ensure even cooking. The dish is typically seasoned with herbs and spices to enhance the flavors. To prepare a vegetable gratin, the vegetables are arranged in a baking dish, covered with a mixture of cream or milk, and sprinkled with cheese, such as Gruyère or Parmesan. The dish is then baked until the top is golden brown and bubbly, creating a deliciously comforting meal.