Rösti or rööschti is a Swiss dish consisting mainly of potatoes, sautéed or shallow-fried in a pan. It was originally a breakfast dish, commonly eaten by farmers in the canton of Bern, but is now eaten all over Switzerland and around the world. The French name röstis bernois directly refers to the dish's origins.

The potato is a starchy root vegetable native to the Americas that is consumed as a staple food in many parts of the world. Potatoes are tubers of the plant Solanum tuberosum, a perennial in the nightshade family Solanaceae.