1 tbsp. chopped parsley optional
1/4 cup ketchup
1/2 cup cheddar cheese
1 egg
1/2 tsp. pepper
3/4 salt
1 tbsp. Worcestershire sauce
1 tbsp. yellow mustard
1/4 cup panko breadcrumbs
1/2 cup cooked and crumbled bacon
1/2 cup onion finely diced
2 tsp. olive oil
1 1/4 pounds ground beef