What is a style of vegetable preparation in which the covered with topping such as sauce cheese and or bread crumbs browned under broiler salamander?

A gratin is a dish of vegetables, often layered with cheese, breadcrumbs, and sometimes other toppings like cream or sauce. It's then browned under a broiler or salamander, giving it a crispy, golden-brown crust.

Some common examples of gratins include:

* Potato Gratin: Thinly sliced potatoes layered with cheese, cream, and seasonings.

* Broccoli Gratin: Tender broccoli florets layered with cheese sauce and breadcrumbs.

* Cauliflower Gratin: Roasted cauliflower florets tossed with cheese, garlic, and herbs.

The key elements of a gratin are the layered vegetables, the topping of cheese and/or breadcrumbs, and the browning under a heat source.