Salisbury Steak Meatballs

Name: Salisbury Steak Meatballs
Prep time: 30 min
Cook time: 1 h
Total time: 1 h 30 min
Cuisine: American
Ingredients: 1 1/2 pound ground beef (lean); 1/2 cup breadcrumbs (I used Panko); 1 egg; 1/4 cup ketchup; 1/4 cup mustard (coarse grain ); 1 tablespoon Worcestershire sauce; 1 teaspoon seasoning salt; 1/2 teaspoon pepper; 1 teaspoon onion powder; 2 tablespoon olive oil (for frying); 2 tablespoon butter (unsalted); 1 large onion (chopped); 1 cup beef broth (or chicken broth, low sodium or no sodium added); 2 tablespoon cornstarch; 1/2 teaspoon seasoning salt; 1 tablespoon ketchup; parsley ( for garnish); 5 large potatoes (peeled and chopped into 1 inch cubes); 4 tablespoon butter (unsalted, 1/2 stick); 1/4 cup skim milk (add more if needed); 1/4 cup cream cheese (light); 1/4 teaspoon salt (or to taste); 1/2 teaspoon white pepper (or to taste)