Preheat the oven to 350 degrees.
1 slice low-carb bread, spread with mayonnaise
1 slice of Starns smoked ham from Kroger, folded
2 slices of pineapple in its own juice, drained
1 slice of baby Swiss cheese, folded
Put this stacked open-faced sandwich in the oven for five minutes.
It's quick and easy. It's reasonably low-carb. I think it might be more "diet" if I only put one slice of pineapple, but I really like pineapple.