Steps

1. Peel the onion and grate 40-50g of onion. [Pro Tip!] Hold the onion by the root and grate from the top to prevent it from falling apart, making the process easier.
   🕒 04:07
2. Break 100g (approx. 5 pieces) of "Sato no Kirimochi Single Pack Mini" into four pieces by hand, then finely chop with a knife. [Pro Tip!] Chopping it finely helps it blend into the hamburg steak, but leaving it a bit coarse will enhance the mochi's chewy texture.
   🕒 05:42
3. In a bowl, combine 300g ground beef and pork, grated 40-50g onion, chopped 100g kirimochi, 3 tbsp panko (breadcrumbs), 4 pinches salt, 4 tsp mayonnaise, 6 dashes black pepper, 8 dashes garlic powder, and 8 dashes MSG(Ajinomoto) (MSG). Knead well until sticky.
   🕒 07:22
4. Divide the kneaded hamburg mixture into two equal portions, shape into thick round patties while removing air. Lightly indent the center and chill in the refrigerator. [Pro Tip!] Chilling in the refrigerator prevents the meat fat from leaking out, resulting in a juicier finish.
   🕒 09:41
5. Finely chop 60g green onion and grate 10g ginger.
   🕒 11:58
6. In a pot, combine 500cc water, chopped 60g green onion, grated 10g ginger, 3g dried wakame seaweed, 1 tsp chicken stock powder, and 1 tsp Hondashi (Japanese soup stock powder). Bring to a boil. Once boiling, add 4 dashes black pepper and, if desired, 1 pinch salt to adjust the seasoning.
   🕒 12:46
7. Heat a frying pan with oil to taste over medium heat. Arrange the formed hamburg patties, cover with a lid, and cook for about 5-6 minutes until one side is browned.
   🕒 14:47
8. Once one side is browned, flip the patties, add a small amount of water, cover with a lid, and steam-cook over low heat. Cook thoroughly until the center is done and the mochi melts. Once cooked, transfer to a plate.
   🕒 17:03
9. Wipe off any excess oil from the frying pan where the hamburg steaks were cooked, and melt 15-16g butter. Add 2 tbsp soy sauce, 1 tbsp and 1 tsp vinegar, 2 pinches sugar, and 6 dashes MSG(Ajinomoto) (MSG), and reduce until thickened. Pour the reduced sauce over the hamburg steaks.
   🕒 19:32
10. Add 3-4 pieces of "Sato no Kirimochi Single Pack Mini" to the pre-boiled soup and drizzle with sesame oil to taste. Heat for about 1 minute until the mochi softens.
    🕒 20:59