Beef Steak, Filipino-Style

1/2 kilo beef sirloin, thinly sliced

2 tbs calamasi or lemon juice

1 big onion, sliced into rings

3 tbs soysauce

1 tsp ground black pepper

4 tbs vegetable oil

Marinate the beef in soysauce, lemon juice and pepper for 15 minutes. Then heat oil, pan fry the beef until medium rare. Move in to a platter. In the remaining oil, sautee the onion rings until half cooked and garnish the beef with it.