Żurek - sour rye soup

This soup is made from homemade starter with white sausage, bacon, mushrooms and vegetable, is especially eaten for Easter.
I like to make it when it is very cold outside. During winter it is my go to dish, I make a lot of it and have lunch for 2 -3 days, it tastes especially exquisite after hiking, skiing and snowboarding day served in a loaf of bread or on top of boiled potatoes. In my opinion.