Wash the tomatoes, cut them in half. Peel onion, chop roughly. Wash and chop the parsley. Cut avocado in half, stone. Remove the flesh from the skin, cut into pieces and sprinkle with lime juice. Wash steak, dab dry. Remove fat edge, cut meat into strips.
Heat the oil in a pan. Fry the steak strips in it all around for about 2 minutes. Season with salt and pepper and remove. Sauté onion and tomatoes in hot frying fat, add meat and avocado and warm up briefly. Season everything with salt and pepper. Sprinkle with parsley. Ciabatta tastes good with it.