Beef with Green Pepper (青椒牛肉片, qīng jiāo niú ròu piān)

Really, really delicious. The two red peppers were somewhat hotter than I expected; next time I would probably use 1 or 1 1/2. The dish was relatively simple, with slightly less cutting work to do and fewer steps. We stir-fried the meat instead of deep-frying it, which worked perfectly well. The meat was especially delicious, very tender, though I couldn't figure out whether that was due to the marinade or the quality of the meat or anything else.