Beef with jalapeno

1 1/2 pound beef, flank steak 1 each onion sliced 1 each green bell pepper cut into strips 1 each sweet red bell pepper cut into strips 1 each jalapeño pepper[...]

2 lbs of flank , pepper or skirt steak 4 ripe tomatoes , peeled and sliced - seeds are fine 3 Bell peppers (go for colors), seeds and ribs removed, sliced 1 C[...]