Meat Mixture:
1 1/2 pounds lean ground beef
1/2 cup seasoned breadcrumbs
1 tablespoon ketchup
2 teaspoons dry mustard
4 dashes Worcestershire sauce
1 cube beef bouillon, crumbled (or powdered beef base)
Salt and pepper
1 tablespoon butter
1 tablespoon olive oil
Gravy:
1 whole onion, halved and thinly sliced (or diced if you prefer)
2 cups beef broth, more if needed for thinning
1 tablespoon ketchup
1 teaspoon seasoning sauce, such as Kitchen Bouquet, optional
4 dashes Worcestershire
1 teaspoon cornstarch, optional
Salt and pepper