How to describe a sandwich. By June

How to describe a sandwich

In my sandwich I would have to start with Lettuce and in it would have the condiment and that would be mayo then the filling would be flaked Tuna.

First

I  would break a piece of lettuce and and put out the mayo out of the fridge and spread the mayo with knife and then you can bring out a can of flaked tuna and then put the flaked tuna on top of the mayo and at the bottom of the mayo would be a piece of lettuce.
And  you would have a yummy sandwich.