Cheesey Hamburgers with Mild Onion Sauce

1. 1

   To make the burgers, mince the onion, shiitake mushrooms, and carrots, microwave for 2.5 minutes, then cool.

2. 2

   Grate the onion for the sauce.

3. 3

   Combine the Step 1 mixture, egg, panko, salt, pepper, and nutmeg with the meat to make the hamburger mix.

4. 4

   Divide the hamburger mix into 4 portions, wrap each around a piece of cheese and form into patties.

5. 5

   Make a slight depression in the center of each patty, taking care not to let the cheese fall out.

6. 6

   To grill the patties, heat oil in a frying pan, then add the burgers.

7. 7

   Once browned on one side, flip over, cover the pan with a lid, then cook through.

8. 8

   When both sides are browned, transfer to a serving dish.

9. 9

   Without cleaning the pan, lightly fry the grated onion.

10. 10

    Add the ketchup, mirin, soy sauce, and Japanese Worcestershire sauce, then bring to a boil.

11. 11

    Drizzle over the hamburgers, then serve.

* Per serving · 4 servings · Values may vary.