Chop the onion and garlic and fry in vegetable oil (1-2 tablespoons).
Add the mushrooms cut into strips, add salt so that the mushrooms let the juice, and fry until the mushrooms get a golden hue.
Remove the fried mushrooms from the heat and cool.
Peel the boiled beets and cut into slices. The pieces should be about the same as the mushrooms.
Season the beetroot with a mixture of salt, pepper, horseradish, mustard, wine vinegar and vegetable oil (1 tbsp each).
Tear the lettuce leaves with your hands.
Lightly chop the almonds with a knife, the pieces should remain quite large.