Hold the bowl with your left hand and mix the ingredients firmly with your right hand to make the patty.
Mix all the ingredients by repeatedly squeezing and opening your hands until it becomes sticky.
Divide into 4 equal pieces and shape into ovals.
Toss it lightly from one hand to the other to remove the air.
When the center of the oval patty is lightly pressed, the forming process is complete. (When the patty is cooked, the center will puff up, so press down lightly when forming. If you press down too much, the center will lose its volume and become flat, so make sure to press down lightly.)
Heat 1 tbsp of oil in a frying pan over medium heat and then gently place the patty in it.
Cook for 2-3 minutes, turning over with a turner when browned.
Cook for another 2-3 minutes, then transfer to a heatproof dish and bake in a preheated oven at 200°C for 10-15 minutes. DON'T wash the frying pan yet. (The baking time will vary depending on the thickness of the patty.)
Place a bamboo skewer in the center of the thickest part of patty. It is cooked when clear juices come out from there.
To Make Sauce
Add all the seasonings B to the frying pan in which the meat was cooked and heat over low heat.
After it is lightly simmered, serve it over the hamburger steak.