Layer the ham, and then the Swiss cheese on a slice of bread. (I like chipped ham for the texture and use approximately 2 ounces of ham and two slices of Swiss cheese per sandwich.)
Top with crisp lettuce, juicy tomato slices, and pickles—in that order. Spread a nice layer of mayonnaise on the top piece of bread, place over the pickles, and enjoy.
For the record, there was no mention as to which way the sandwich was cut. I cut on the diagonal–and served with potato chips. (Tucking a few of the chips in the sandwich adds a welcome crunch!)