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1
Peel the potatoes, cut into fourths, and boil.
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2
Finely chop the onions, and saute in a pan coated with vegetable oil (not listed, about 1 teaspoon) until they become transparent.
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3
Add the ground meat, cook until it changes color, add salt, soy sauce, pepper, and nutmeg and saute some more.
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4
Once the potatoes are cooked through, drain, season with salt and pepper, and mash.
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5
Once they are pretty well mashed, add milk and mix thoroughly (Adjust the firmness to your liking with milk).
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6
Taste, and add more salt if needed.
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7
Put half of the mashed potatoes into a casserole dish, and spread it out evenly.
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8
Add all of the ground meat from step 3, and top with cheese.
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9
Divide the remaining mashed potatoes into 3 equal portions and scatter on top.
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10
Press it out evenly with plastic wrap.
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11
Coat it with whisked egg; use a fork to make a pattern, and cook at 480F/250C for 15 minutes, and then at 570F/300C for another 5-6 minutes.
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12
You are done once it turns golden brown!
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13
*If you are having trouble getting it to turn golden brown, I have a little trick...
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14
Mix 1 teaspoon of Mirin in with the whisked eggs and coat, and it will turn golden brown easily.
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15
**If you don't have Mirin, then bake at 570F/300C from the start until it browns, and then reduce the heat.
