For the patties
01 -
1 1/2 lb (680 g) ground beef, preferably 80/20
02 -
1/2 cup (45 g) panko breadcrumbs
03 -
1 large egg, lightly beaten
04 -
1 tablespoon ketchup
05 -
1 teaspoon Dijon mustard
06 -
2 teaspoons Worcestershire sauce
07 -
1 teaspoon garlic powder
08 -
1/2 teaspoon smoked paprika
09 -
1 teaspoon kosher salt
10 -
1/2 teaspoon black pepper
11 -
1 tablespoon neutral oil
For the onion gravy
12 -
2 medium yellow onions, thinly sliced
13 -
2 tablespoons all-purpose flour
14 -
2 cups (480 ml) low-sodium beef broth
15 -
1 tablespoon ketchup
16 -
1 teaspoon Worcestershire sauce
17 -
1/2 teaspoon Dijon mustard
18 -
Salt and black pepper, to taste
19 -
1 tablespoon chopped parsley, optional