Korean style BBQ beef strips in tender leaves of lettuce make the perfect light starter for any party.
Do ahead: If you are planning a party with lots of cooking make the marinade up to a week before you need it. The meat can be marinated the night before as long as you refrigerate it. On the day of the party cook the beef about an hour before you want to serve it and let it rest longer. Assemble the cups right before you want to serve them.