Loco Moco is a Hawaiian dish that according to the internet originated at a restaurant in 1949, although the egg on top came later. I had never heard of this dish, but both my husband and son knew what it was. It just looked tasty to me, so we had it for dinner.
The dish starts with rice, is topped with a seasoned burger patty, slathered in beefy gravy, and then topped with a fried egg and some scallions. I included mushrooms and onions in the gravy, though I’m not sure if this is typical or not.  This dish is super simple, so it is important that each element is well seasoned.  The gravy is interesting in that it has soy sauce, Worcestershire sauce and ketchup in it.  
Overall we really liked this and we thought rice topped with gravy was a great idea. :) I think this dish could use a little acidity so I think if I made it again I might add some kind of pickled vegetable on top too. 
Loco Moco
Ingredients
For the burgers:
- 1 lb ground beef I used 85/15
- 1 tbsp Worcestershire sauce
- 1 1/2 tsp season salt
- 1 tsp garlic powder
- 1 tsp onion powder
- 1/2 tsp black pepper
For the gravy:
- 2 cups beef broth
- 4 tsp soy sauce
- 1 tsp Worcestershire sauce
- 2 tsp ketchup
- 5 tsp cornstarch
- 1 onion sliced (optional)
- 1 cup sliced mushrooms optional
To serve:
- fried eggs
- sliced scallions
- cooked rice
Instructions
For the burgers:
- Combine all the ingredients in a bowl and mix gently. Form into patties and place in a skillet on medium heat. Allow the patties to cook and brown on both sides, flipping them as needed. If using store bought ground beef you need to cook them well done. If you grind your own beef, cook how you like them. Set aside under foil while you finish the rest.
For the gravy:
- In the same skillet, add a little oil and the mushrooms and onions over high heat. Season with salt. Cook until browned. Whisk the gravy ingredients together in a bowl and whisk them into the pan. Once the gravy thickens, remove from the heat while you fry the eggs.
To serve:
- Place some rice on a plate, top with the burger, spoon over some gravy and place the egg on top. Sprinkle scallions over and serve.