[Note]: It looks like MoZen only does their brunches on special holidays (Easter, etc) and not on a weekly (Sunday) basis anymore.
I would make a trip just to eat those, and to drink their Mimosas-- strong but very delicious. (If anyone knows of their Mimosa recipe and am willingly to share I would be grateful).
We enjoyed our meal so much that we sent my Fiance's parents there a few months after (they also had a great time as well and picked the same entrees).
You can easily purchase a MO gift certificate online. E-delivery is free, but if you want a physical gift card, they do add on a per item shipping fee ($20-$27+ to HI for example).
Or if you have some extra Amex Rewards points lying around (and you don't mind the less desirable conversion), you could always convert points for a free MO e-gift card (12,000 Amex MR for $100). The great thing is that you can use it at any Mandarin Oriental in the world.
After previewing the sample menu they offer, I couldn't wait to try it out in person.
We didn't realized it at the time, but their Sushi Chef ("Chef Katz") is from Hawaii-- and is Fiance's parent's friend. Apparently he was the same Chef that came over one time (years ago) to make Sushi for us. Unknowingly, my Fiance frequents his restaurant here often (still named "Katz's Sushi" but is now under a new owner). The funniest thing is that he goes there to eat their Hamburger steak and not Sushi (which he claims is amazing!).
The only downside is that if you make a noon reservation for Sunday Brunch at MoZen, even if you show up early, you still need to wait until they are done setting up at noon. It's a good thing depending how you look at it (if you are a guest still enjoying your Breakfast). But we definitely will return to MoZen again!