Herring salad with potatoes

Soak the herring, peel, remove the bones, cut into thin pieces. Peel and soak the milk in water, broth or milk, rinse with water. Peel and cut boiled potatoes, apples and cucumbers into small cubes. Mix the vegetable oil with mustard, vinegar, salt, sugar and pepper. Mix all the ingredients, fill with dressing, let soak. Instead of dressing, you can use mayonnaise (50-100 g), add apple wine (cider), pieces of meat or sausage, vegetables pickled in vinegar to the salad.