Don't attempt to cut the pig trotters yourself. Your butcher will do it for you. Make sure to take the eggs out of the marinade after a maximum of 8 hours, otherwise the salt from the soy sauce will harden that yummy runny yolk in the center. The mayu is a little scary to make, because you are literally burning garlic. But as long as it is done slowly, you will be rewarded with a delicious roasted flavor.