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1
First, make the sauce.
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2
Finely slice the onion and boil it in the water.
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3
Add all of the sauce ingredients apart from the flour into the pot.
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4
Dissolve the flour in water (not listed in the ingredients), add to the pot, and boil.
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5
Don't worry if any lumps form, because they will dissolve later.
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6
The sauce will slowly thicken, and once it has thickened, bring it down to low heat, and gently simmer.
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7
Make the hamburgers in the meantime.
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8
Finely chop the onion for the hamburgers.
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9
Quickly stir-fry the onions with the margarine.
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10
Place the stir-fried onions into a bowl, and slightly cool.
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11
In the meantime, soak the panko in the milk.
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12
Add the ground meat and panko that was soaked in milk into the bowl that the onions were cooled in.
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13
Sprinkle in some salt and pepper, and knead together with your hands.
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14
If the mixture is too loose, add some more panko while kneading, and knead until it becomes sticky.
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15
Shape the mixture into oblong patties, with dents in the center.
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16
Lightly drizzle some oil onto a frying pan and heat over low heat.
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17
Bring the heat to high heat, and cook the patties until the surfaces are brown.
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18
Flip them over, and cook until the other sides have browned as well.
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19
Pour enough sauce from Step 4 into the frying pan to cover the hamburgers.
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20
Cover with a lid, and simmer for approximately 10-15 minutes over medium heat.
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21
It is complete once the sauce has reduced by half.
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22
Check that the hamburgers have cooked through by inserting a bamboo skewer into the meat, and test for any cold areas.
