Step 1

Let’s prepare the ingredients. Chop the onion into fine pieces.

Step 2

Remove the stem end of the shiitake mushrooms and separate the stems and the caps. Chop the caps and the stems into fine pieces.

Step 3

Saute the onion mixture. Coat a pan with the olive oil. When the pan is hot enough, stir-fry the onion and shiitake mushrooms. Lightly brown the onion mixture. Season with the salt and the pepper.

Step 4

Put the mixture into a bowl. When the mixture has cooled down place it in the fridge to chill it.

Step 5

Combine the patty ingredients. To the chilled onion mixture, add the beaten egg and soft bread crumbs. Mix to combine.

Step 6

Gather the mixture to the edge, making a space for the meat. Add the ground pork and beef mixture. Add the salt and the pepper. Knead the meat until it begins to look smooth and turn kind of gooey.

Step 7

Combine the onion mixture and the ground meat, and knead it thoroughly. Shape the meat into a ball and throw it into the bowl, removing the air inside.

Step 8

Clean your hands. Then, coat your hands with olive oil. Divide the ground meat in half. Hold the half in your palms and shape it into an oval. Then, wrap the cheese with it.

Step 9

Shape it into an oval again and place the patty onto a tray. Repeat the process and now you have 2 hamburg steaks.

Step 10

Let’s cook the hamburg. Heat the olive oil in a pan. Place the patties into the pan and gently press with your hand.

Step 11

When the other side firms up, change the position of the patties to brown evenly.

Step 12

Cover, reduce the heat to low and brown the other side thoroughly.

Step 13

Flip the patties over. Shift the position of the patties again. Make sure to brown the sides of the meat.

Step 14

When both sides are completely browned, pour the water into the pan. Cover and fry the patties for about 8 minutes until the water almost evaporates.

Step 15

Pierce the hamburg with a bamboo stick. If the juices are clear, they are ready to serve.

Step 16

Place the hamburg next to the mixed vegetables onto a plate.

Step 17

Let’s make the sauce. Remove the excess oil with a paper towel. Add the packaged demiglace sauce, bouillon broth, soy sauce and apple jam, or ketchup. Turn on the burner and mix the sauce evenly.

Step 18

Bring it to a boil and reduce the sauce until it reaches the desired consistency as shown. Sprinkle on the salt and the pepper to taste.

Step 19

Pour the sauce over the hamburg. Now, it is ready to serve.