Place a 12-inch parchment paper square on your work surface. Layer 4-5 lettuce leaves on top, overlapping each other.
On the lettuce leaves, layer the ham and cheese.
Spread the guacamole on top, then add the tomato, onion, and bacon.
Roll the lettuce wrap sandwich as tightly as you can, using the parchment paper as your guide, much like you would use a sushi mat to make a sushi roll.
When the lettuce is completely rolled, wrap the parchment paper tightly around it and tuck it underneath the roll. Use a serrated knife to cut the lettuce wrap sandwich in half, and dig in!
Video
Notes
The ham, bacon, and cheese obviously add a lot of sodium. If this is a concern, you can use other, lower sodium fillings. For example, you can make a tasty sandwich using guacamole or avocado oil mayonnaise, thinly sliced grilled chicken breast, tomatoes, and onions.