A delightful twist on classic Japanese-style hamburgers, these beef patties are juicy, flavorful, and paired with a rich, umami-packed sauce.
Season the ground beef with salt and pepper in a mixing bowl.
Use your hands to mix gently for even seasoning.
Dice the onion finely and sauté in a skillet until translucent.
Cook the onion on medium heat to avoid burning.
In a small bowl, beat the egg and mix with milk and breadcrumbs. Let it rest for a few minutes.
Allowing the breadcrumbs to soak ensures a moist patty.
Combine the sautéed onion and breadcrumb mixture with the seasoned beef. Mix gently.
Avoid overmixing to keep the patties tender.
Divide the mixture into four portions and shape into patties.
Press the patties slightly thinner in the center to cook evenly.
Heat oil in a skillet and cook the patties on medium heat until browned on both sides and cooked through.
Cover the skillet while cooking to retain moisture.
Remove the patties and prepare the sauce in the same skillet by combining ketchup, sake, Worcestershire sauce, soy sauce, and butter. Simmer until thickened.
Scrape the skillet to incorporate the browned bits into the sauce for extra flavor.
Serve the patties topped with the sauce.
Garnish with chopped parsley or green onions for a fresh touch.
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