Place the butter lettuce and rocket into a bowl and add the red pepper pesto.
Mix well to coat all the leaves with the pesto.
Cut open the seeded buns and add sweet mustard on both sides.
Add the dressed lettuce.
Add the slices of loin roast, gherkins, thinly sliced ham and the caramelised onion.
Serve
Wrap these individually with baking or wax paper.
Tip: make sure that the piece of wrapping paper is big enough to use as a plate while eating in the car so there is no mess. That is if you make it to the car.