What is "herring salad"?

Herring salad is a traditional dish that is popular in many northern and eastern European countries such as Sweden, Denmark, and Germany. The salad is typically made with pickled herring, which is mixed together with a variety of ingredients such as boiled potatoes, onions, apples, and beets. The salad may also include other ingredients such as pickles, capers, or hard-boiled eggs, depending on the recipe. Herring salad is often dressed with a simple vinaigrette made from olive oil, vinegar, and spices, which gives it a tangy and savory flavor. Herring salad is a healthy and nutritious dish that is rich in protein, omega-3 fatty acids, and other essential nutrients, and it is a perfect way to showcase the flavors and textures of pickled herring.