The soy sauce to sesame oil ratio is 1 part sesame oil to 2 to 6 parts soy
sauce depending on the fat content of your meat - also Koreans love garlic.
This recipe can be augmented with chopped scallions, chopped onions, fresh
ginger, finely chopped carrot, perhaps a pinch of sugar, perhaps a splash
of herbed vinegar, perhaps a dash of salt and hot pepper paste (Korean hot
red peppers are around jalapeno land in warmth and the red pepper paste has
sweet, sour and salty tones to it in keeping with the oriental cooking
philosophy). This can be applied to everything from fish, chicken and
pork - to dog believe it not. Obviously you wouldn't want to marinade fish
too long, but baste it as it cooks instead, but it works as a marinade for
other cuts of meat just fine.