Ertesuppe med flesk is a traditional soup originating from Norway. The soup is usually made with a combination of split peas, leeks, smoked ham, potatoes, rutabaga, and salt. The ham, leeks, and peas are covered with water and cooked until the peas and the meat become tender.

The soup is simmered for about 2 hours and it's then seasoned with salt before serving. If the soup is too thin, it's recommended to cook it uncovered. Ertsuppe med flesk is typically served with boiled potatoes, mustard, and sliced rutabaga. The soup is especially popular on cold winter days.