While the macaroni is cooking, stir 1 1/2 cups mayonnaise, 1/4 cup sweet pickle relish, 2 tablespoons distilled white vinegar, 1 tablespoon prepared yellow mustard, 1 teaspoon kosher salt, 1/2 teaspoon black pepper, 8 ounces small-diced cooked ham, 3 diced hard-boiled large eggs, 1 small-diced medium red bell pepper, 2 small-diced medium celery stalks, and 1/2 medium small-diced Vidalia onion together in a large bowl.
