Russian salad sandwich is a delicious and filling sandwich that is perfect for a quick and easy lunch or snack. The sandwich features a creamy and flavorful filling made with a combination of boiled potatoes, carrots, peas, and mayonnaise. The filling is seasoned with salt, pepper, and a hint of mustard for added flavor. The sandwich can be enjoyed on its own or paired with a side of chips or a fresh salad. It is a versatile and satisfying option for any time of the day.