Steps

1. Finely chop 1/2 onion. 【Key Tip!】 Chop any larger pieces into smaller ones for a more uniform texture.
   🕒 02:25
2. Finely chop 2 pieces of beef fat.
   🕒 02:58
3. Heat 10g butter in a frying pan. Add the finely chopped 1/2 onion, sprinkle with a pinch of salt, and sauté over medium heat. 【Key Tip!】 Sauté the onions until they are slightly browned, then let them cool.
   🕒 03:21
4. In a bowl, combine 300g ground mixed meat, 1 egg, the chopped 2 pieces of beef fat, 4 tbsp breadcrumbs, 3 tbsp water, 2/3 tsp consommé, 2 tsp gelatin, a pinch of salt, a pinch of black pepper, and the cooled sautéed onions. 【Key Tip!】 Gelatin has a moisture-retaining effect, which prevents juices from escaping.
   🕒 04:38
5. Knead the mixture thoroughly. 【Key Tip!】 To ensure the beef fat is evenly distributed and doesn't solidify, knead until it's well incorporated into the meat.
   🕒 05:57
6. Divide the kneaded hamburg mixture into two portions and shape them, pressing out any air. 【Key Tip!】 Make an indentation in the center to ensure even thickness, allowing the inside to cook through easily.
   🕒 06:32
7. Heat a little cooking oil in a frying pan over low to medium heat and brown one side of the hamburg steaks. 【Key Tip!】 Due to the gelatin, they can burn easily, so cook slowly over low heat.
   🕒 07:10
8. Cover with a lid and cook to ensure the inside is cooked through.
   🕒 08:37
9. Flip the hamburg steaks and brown the other side.
   🕒 08:52
10. Add 50cc of water, cover with a lid, and steam for 4-5 minutes.
    🕒 09:13
11. Insert a toothpick into a hamburg steak. If clear juices run out, it's cooked. If the juices are still cloudy, cook for another minute over low heat.
    🕒 09:54
12. Turn off the heat and transfer the hamburg steaks to a plate.
    🕒 10:29
13. Using the flavorful drippings remaining in the frying pan, make the sauce. Add [A] 2 tbsp soy sauce, [A] 2 tbsp mirin, [A] 2 tbsp sake, 2 pinches of MSG(Ajinomoto) (MSG), and the chopped 1 clove of garlic to the pan and heat.
    🕒 10:44
14. Heat until everything is combined and slightly reduced.
    🕒 11:25
15. Pour the sauce over the cooked hamburg steaks.
    🕒 11:46