Boil the beets. Cut into cubes. Add a little vegetable oil, mix.
Chop and fry the mushrooms.
Fry the potatoes with paprika until tender.
For dressing, mix vegetable oil, soy sauce and mustard. I have French mustard.
Cut the onion into feathers. Put lettuce leaves on a plate. If desired, you can just tear them up. Then mix the beets, mushrooms, potatoes and onions. Pour the dressing over everything.