My favorite meal from Mr P is watercress and beef stir-fried in the wok... hands... down...  We make the meal fairly often, since it takes so little time to make.  We made a pot of rice, then followed this recipe for making the stir-fry.  However, we substituted Chinese chives (gao choy) in lieu of the watercress, and we used baby corn instead of bamboo shoots.  Really, you can add whatever you want, this is just what we happened to have in the cupboards and fridge.  We made this Saturday night, and I was able to capture almost every step in the cooking process for once!  Enjoy!