Mince the shiitake mushrooms and onion.

Heat half of the salad oil (1/2 tbsp) in a frying pan, add the minced shiitake and onion, and sauté over medium-low heat for about 5 minutes until softened. Let cool.

In a bowl, soak breadcrumbs in milk. Add ground meat, sautéed vegetables, salt, and pepper. Mix until sticky and form into two oval-shaped patties.

Clean the frying pan and heat the remaining salad oil (1/2 tbsp). Add the patties and cook over medium heat until browned on one side.

Flip the patties, cook until browned on the other side, cover with a lid, and cook on low heat for about 7 minutes until fully cooked.