While lettuce wraps certainly aren't your typical sandwiches, you can still fill leaves of lettuce with everything you'd put between two pieces of bread. (paleogrubs.com)
For genuine BBQ flavor, couple this spicy tofu with crunchy slaw and serve as a sandwich or wrapped in a large leaf of lettuce with sliced tomato and red onion. (marthastewart.com)
It's easy to make too: just replace a «normal» wrap with a big leave of lettuce and roll it up — making sure you don't stuff it too much or it won't hold. (rosalieruardy.com)