This comes from the author of the Eating and Living blog, a Korean-American mom with some great recipes. The contrast between the spicy meat and the crisp cool lettuce leaves is just delicious and fun. I can buy the meat sliced for bulgogi at my local Korean market, but if you don't have one of those handy, you might want to partially freeze your meat, which will help you slice it very thin. I like to serve this with rice. Prep time does not include marinating time.