3 herbed vidalia onion sandwiches Recipes

vidalia or other sweet onion, peeled and thinly sliced, salt-free onion and herb seasoning blend, divided, water, fat-free , less-sodium beef broth, very thinly sliced low-sodium deli roast beef (such as boar s head), hoagie rolls , split lengthwise, reduced-fat swiss cheese , torn in half

softened cream cheese, mayonnaise, minced parsley, salt and pepper, sourdough bread, sweet onion (such as vidalia), stemmed watercress