01 -
Preheat a cast-iron pan over medium heat for 3 to 4 minutes and an oven to 175°C (350°F).
02 -
In a large mixing bowl, combine ground beef, eggs, breadcrumbs, Worcestershire sauce, garlic powder, onion powder, seasoned salt, and black pepper until thoroughly mixed.
03 -
Divide the mixture into four portions and shape each into 1.5-inch thick oval patties.
04 -
Add avocado oil to the cast-iron pan and cook two patties at a time for 3 to 4 minutes on each side. Remove par-cooked steaks to a tray and repeat with remaining patties.
05 -
Add onions to the steak pan and cook for 4 to 6 minutes or until softened.
06 -
Add butter and flour to the pan with onions, then pour in beef stock and mix. Season with black pepper and remove from heat.
07 -
Nestle the steaks over the onions in the pan, then bake in the oven for 20 minutes or until the internal temperature reaches 65°C (150°F).
08 -
Remove steaks and serve with onions and jus over prepared mashed potatoes.