how to cook? Today I bought some sweet potatoes in market. It has been quite long time since I left Korea and came to America, but still it's hard to cook in American style. Above all, I'm not used to using ovens when cooking, and I had a small happening today that I absolutely didn't know the parameter on the oven of my dorm room in Fahrenheit !! I misunderstood it is on Celsius like in Korea. My poor sweet potatoes kept as fresh as they had been just before cooked. Crunch ! crunch ! As the sound spread throughout my kitchen, my tears also dropped on floor