heat bacon cubes in low heat in pan until they've lost all their fat, remove from pan, cut 1kg beef in chunks, and brown in bacon fat (do it in batches, don't overfill the pan), remove from pan, add 2 onions, 2 celery sticks, 2 carrots all sliced to the pan and cook for 10 minutes, add all beef and bacon back and cover in 1 liter of wine, let simmer in open pan for 2 - 2.5 hours, add 500gram onions, 400 grams pearl onions (weight before leaking) and 400 grams of potato cubes, simmer more 1 hour