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1
Finely chop the onion, place in a heatproof dish, wrap with plastic, and microwave at 600 W for 3 minutes.
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2
Let cool.
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3
Combine the ground meat with a bit of salt in a bowl and knead quickly.
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4
Add the egg, pepper, nutmeg, and panko and mix well.
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5
Take half of the meat in your hand and toss back and forth from one hand to the other a couple times to release air pockets.
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6
Press the meat out into a disc a bit larger than a wheel of Camembert cheese and top the meat with cheese.
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7
Cover with the remaining meat to envelop the cheese, then toss the patty between your two hands again to release air pockets.
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8
Cook both sides of the hamburger patty in a frying pan (you don't need to add oil).
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9
Bake in an oven preheated to 200C for about 25-30 minutes.
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10
To check if it has cooked through or not, stick with a skewer and check if the juices are clear.
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11
Sauce: Combine the sauce ingredients with the remaining meat juices in the frying pan and turn on the heat.
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12
Once it comes to a boil, turn the heat to medium-low and simmer for 3 minutes.
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13
Transfer the cooked hamburger steak to a plate and top with the sauce from Step 8.
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14
Serve with your favorite vegetables.
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15
It's full of rich cheese.
