Clean and wash the cabbage and cut into wide strips. Clean the mushrooms and cut them into small pieces if necessary. Peel and finely chop the onion. Heat the fat in a large pan. Fry the mushrooms and onion for about 3 minutes.
Season with salt and pepper and remove from the pan. Stew cabbage in the frying fat for 20-30 minutes. Wash the tomatoes, dab dry and cut in half or quarters. Add the mushrooms and tomatoes to the cabbage and warm it up. Season the pan dish with salt, pepper and caraway