Cocktail Meatballs

1 pound ground beef

1 large egg, lightly beaten

1/2 cup finely chopped yellow onion

1/4 cup fine dry bread crumbs

2 tablespoons grated Parmesan

2 tablespoons milk

2 teaspoons Creole mustard

1 1/2 teaspoons minced garlic

1/2 teaspoon dried basil

1/2 teaspoon dried oregano

1/2 teaspoon dried parsley

1/2 teaspoon Essence

1/2 teaspoon salt

1/4 teaspoon ground black pepper

1/2 teaspoon Worcestershire sauce

1/4 teaspoon hot red pepper sauce

2 teaspoons vegetable oil

2 teaspoons unsalted butter

SAUCE:

1 cup ketchup

1/2 cup grated yellow onions

1 teaspoon minced garlic

1/4 cup packed light brown sugar

1/4 cup red wine vinegar

1 tablespoon Worcestershire sauce

1/4 teaspoon ground black pepper

1 teaspoon salt