Roll the balls into a plate of sesame seeds until it has been fully coated. Pour a large amount of oil into a large deep frying pan (enough to cover a whole sesame ball), and set the flame on high until the oil heats up. To check that it is hot enough, throw a few sesame seeds into the oil. If it floats and bubbles start to form around it, the oil is ready. Turn the flame to a medium-low heat.