Curries , kebabs , korma , pastas like pappardelle with beef cheek , pies like mushroom & steak , rendang as you mentioned , roast beef , prime rib , BBQ ribs , hot pot / shabu shabu or steamboat , sliced & stir fry with mushrooms or vegetables ( broccoli , kai lan , etc ) , stroganoff .. long list . Love beef !

How about oxtail stew ?

Does veal count ?

Like vitello alla milanese

Possibly substituting some with lamb / mutton if she cannot manage with so much beef ?