You have to love a holiday that commemorates how long a bit of oil lasted by eating foods fried in oil. Latkes are the most commonly fried treat on Hanukkah. I've had tasty versions made with leeks or celery root or sweet potato added to the mix, but for my money nothing beats the simple potato-and-onion classic when properly made (you need someone strong to wring out as much liquid as possible from the grated potatoes and onions) and fried in fresh, hot oil.
Did you know that doughnuts fried in oil are another option for the festival of lights? Filled jelly doughnuts may be more traditional, but I like these simple Raised Doughnuts just as well.