In a large mixing bowl, combine the diced ham, celery, red onion, and pickle relish.
Add the mayonnaise and Dijon mustard to the bowl.
Stir in the lemon juice and mix thoroughly.
Season with salt and pepper to taste.
Fold in the chopped parsley for added flavor.
Chill the mixture in the refrigerator for at least 30 minutes.
While chilling, prepare a bed of mixed greens on serving plates.
Once chilled, give the salad a good stir.
Top the mixed greens with generous portions of the ham salad.
Serve immediately and enjoy!