Cut each steak into 3-4 pieces then halved each pieces. If the steak was frozen, once defrozed, it would be tender by itself, but if you buy fresh cut steak and they are not really tender, halved each pieces and tenderize each of it with beef tenderizer tool but lightly. Marinade pieces of steaks with black peppercorn, set aside.
Meanwhile, make thinly slices out of the potatoes, and fry them, set aside.
Combine garlic, onion, tomato and chopped well with food chopper.
Heat 2 tbsp of cooking oil and saute the mixture, add in the steaks slices and the rest of the ingredients. Mix well.