Step 1

Place finely grated onion in a mixing bowl; add panko crumbs and stir it all together.

Step 2

To the mixing bowl add ground beef, minced garlic, egg, ketchup, mustard powder, worcestershire sauce, salt, and pepper; use your hands to mix it all together until well combined.

Step 3

Shape 4 patties into an oval, to resemble a “steak”, and set aside.

Step 4

Heat 2 tablespoons olive oil in a large skillet and set it over medium heat.

Step 5

Add the beef patties to the heated oil and cook for 5 to 6 minutes.Carefully flip them over and continue to cook for 5 to 6 more minutes. Patties are cooked through when internal temperature registers at 155˚F.

Step 6

Remove patties from skillet and set aside; keep them covered.

Step 7

Return skillet to the burner and add 1 tablespoon olive oil.

Step 8

When oil is hot, stir in finely diced onions and cook for 1 minute.

Step 9

Stir in garlic and then mushrooms; cook for 4 to 5 minutes, or until mushrooms are soft.

Step 10

Add butter and swirl around to melt.

Step 11

Sprinkle the top with flour and cook for about 30 seconds, stirring constantly.

Step 12

Pour in the beef broth; mix and stir until everything is combined and there are no lumps from the flour.

Step 13

Add the beef patties and any juices back to the skillet.

Step 14

Continue to cook for 5 to 8 more minutes, or until gravy is thickened; stirring occasionally. If gravy starts to thicken too soon, add a bit of water or beef broth to the skillet.

Step 15

Transfer steaks to a platter.

Step 16

Taste the gravy for salt and pepper; adjust accordingly.

Step 17

Spoon gravy over the Salisbury steaks and serve.