Cook bistek the way you normally would, except add a pack of frozen green beans and sliced up mushrooms when you put the beef in. Actually this one was done on a busy night so I stuck everything, including the onions, in a skillet, left heat on medium, covered it, rushed upstairs and got dressed (~10 minutes), went down, added soy sauce and lemon juice, etc. to the skillet, stir-fried for 2 minutes and ate.