Russian meat soup - Solyanka

As you all know Russians love their soups and Solyanka is one of their favorites!
All I can say is ...You have got to try this soup!

1 lb stewing beef, sliced thin
2 small sausages , sliced thin
1/2 lb ham, sliced thin
2 carrots, cubed small
1 onion, sliced small
3-4 big mushrooms, cut thin
1 pickled cucumber (I used dill pickles)
1 tablespoon tomato paste
1 (14 1/2 ounce) can stewed tomatoes
1/2-1 cup water
5 mushrooms, sliced (or to taste)
1 tablespoon flour
11 pitted black olives, chopped
1 tablespoon capers
salt & pepper
1 tablespoon sour cream, for topping
1 lemon slice, for garnish

Preheat a pan with oil or butter.
Cut onion in thin semi rings and stir until transparent, but not browned.
Cut pickled cucumbers in strips and add to onions.
Add tomato paste and stir until mixed - 2-3 minutes.
Add meat cut in strips (you can actually use any variety of meat you prefer, but above is what I chose to use).
Put everything in a large pot
Add can of stewed tomatoes and water to just the top of mixture.
Cover the pot and cook on medium heat for 2 hours
About 1 hour before serving add olives, mushrooms and capers.
Add flour to thicken.
Serve with a spoonful of sour cream and lemon slice for garnish.