I had no idea how to eat their Bossam at first too. I tried to eat them separately but everything tasted meh on their own. So I had no choice but to ask the waitress who was walking around. She was nice about it. She took my chopsticks and started showing me how to pile a little bit of everything onto a single lettuce leaf. First she ripped off a piece of lettuce leaf and placed 1 slice of steamed pork on the lettuce, then some oysters, then some sweet kimchi. I put the whole concoction in my mouth and ... it was strange but I would consider it good! The best part, the oyster no longer tasted too fishy.
For pics of how the waitress put the bossam together - http://www.fringta.com/2011/10/lim-ga-ne-5529-yonge-st.html